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VHF FM TRANSCEIVER
TK-272G© 2000-11 PRINTED IN JAPANB51-8560-00(S) 790
SERVICE MANUAL
GENERAL ...................................................................... 2
SYSTEM SET-UP .......................................................... 2
OPERATING FEATURES .............................................. 3
REALIGNMENT ............................................................. 7
DISASSEMBLY FOR REPAIR ..................................... 15
CIRCUIT DESCRIPTION ............................................. 16
SEMICONDUCTOR DATA .......................................... 20
DESCRIPTION OF COMPONENTS ............................ 22
PARTS LIST................................................................. 23
EXPLODED VIEW ....................................................... 30
PACKING ..................................................................... 31
CONTENTS
Key top (DTMF)(K29-9043-02)
ADJUSTMENT ............................................................. 32
PC BOARD VIEWS
DISPLAY UNIT (X54-3250-10) ............................... 41
TX-RX UNIT (X57-587X-XX) .................................. 43
SCHEMATIC DIAGRAM .............................................. 49
BLOCK DIAGRAM ....................................................... 53
LEVEL DIAGRAM ........................................................ 55
KNB-14/KNB-15A (Ni-Cd BATTERY) .......................... 56
OPTIONS ..................................................................... 57
SPECIFICATIONS ................................... BACK COVER
Antenna(KRA-14:Option)
Knob (ENC)(K29-5331-03)
Knob (VOL)(K29-5332-03)
Cabinet assy(A02-3568-23)
Knob (PTT)(K29-5334-13)
Knob (Side1)(K29-5333-13)
TK-272G
2
GENERAL / SYSTEM SET-UP
INTRODUCTIONSCOPE OF THIS MANUAL
This manual is intended for use by experienced techniciansfamiliar with similar types of commercial grade communicationsequipment. It contains all required service information for theequipment and is current as of the publication date. Changeswhich may occur after publication are covered by either ServiceBulletins or Manual Revisions. These are issued as required.
ORDERING REPLACEMENT PARTSWhen ordering replacement parts or equipment information,
the full part identification number should be included. Thisapplies to all parts, components, kits, or chassis. If the partnumber is not known, include the chassis or kit number of whichit is a part, and a sufficient description of the requiredcomponent for proper identification.
PERSONNEL SAFETYThe following precautions are recommended for personnel
safety: DO NOT transmit until all RF connectors are verified secure
and any open connectors are properly terminated. SHUT OFF and DO NOT operate this equipment near
electrical blasting caps or in an explosive atmosphere. This equipment should be serviced by a qualified technician
only.
SERVICEThis radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and alignmentprocedures contained within.
SYSTEM SET-UP
Merchandise received
License and frequency allocated by FCC
Choose the type of transceiver
Transceiver programming
Are you using the optional antenna?
A personal computer (IBM PC or compatible), programminginterface (KPG-22), and programming software (KPG-56D)are required for programming.(The frequency, TX power HI/LOW, and signalling data are programmed for the transceiver.)
YES
NO
KRA-14Helical antenna
(Option)
Delivery
Are you using the speaker microphone?YES
NO
KMC-17 or KMC-21Speaker microphone
(Option)
TX/RX 150~174 5.0W TK-272G K
Frequency range (MHz) RF power Type
TX/RX 136~150 5.0W TK-272G K2
Unit
Model & TX-RX Unit Display Unit Frequency range Remarks
destination
K X57-5870-11 150~174MHz IF1 : 49.95MHzTK-272G
K2 X57-5870-13X54-3250-10
136~150MHz LOC : 50.4MHz
TK-272G
3
OPERATING FEATURES
1. Operation Features
Programmable Auxiliary Functions
Side 1, Side 2, °, •, 22222, and 33333 can be programmedwith the auxiliary functions listed below.• Channel Down• Channel Up• Display Character• Group Down 2
• Group Up 2
• Home Channel• Key Lock• Lamp• Monitor A (Monitor Unmute–Momentary)• Monitor B (Monitor Unmute–Toggle)• Monitor C (Carrier Squelch–Momentary)• Monitor D (Carrier Squelch–Toggle)• None• Operator Sel Tone 1
• Redial• RF Power Lo• Scan• Scan Del/Add• Talk-Around• 2-Tone Encode• Trunking Group Code Select 2
1 Available for K market models only.2 Available only when using Trunking function.
2. Programmable keysThe functions the FPU programs to the function keys are
described in the following sections.
1) Channel up/downWhen the key is pressed each time, the channel number tobe selected is incremented/decremented and repeats if heldfor one second or longer.
2) Display characterThis key switches the LCD display between the group/channel number and group/channel name.
3) Group up/downWhen the key is pressed each time, the group number tobe selected is incremented/decremented and repeats if heldfor one second or longer.
Antenna
qqqqq eeeee
rrrrr
tttttyyyyy
uuuuu
iiiii
ooooo
wwwww
Microphone
Speaker
The transceiver is shown with the optional KNB-14 battery pack.
qqqqq Rotary encoderYour dealer can program the encoder as either GroupUp/Down (only when the trunking board is installed)or Channel Up/Down (default setting). Rotate toselect a group or channel. Also rotate to adjust thesquelch in Squelch Adjustment mode.
wwwww LED indicatorLights red while transmitting. Lights green whilereceiving. Flashes orange while receiving a CodeSquelch or Selective Call code, or a 2-Tone or DTMFsignal that matches the one set up in your transceiver.Flashes red when the battery power is low whiletransmitting.
eeeee Power switch/ Volume controlTurn clockwise to switch ON the transceiver. Rotateto adjust the volume. To switch OFF the transceiver,turn counterclockwise fully.
rrrrr PTT (Push-to-Talk) switchPress this switch, then speak into the microphone tocall a station.
ttttt Side 1 keyThis is a PF (Programmable Function) key. Press itto activate its auxiliary function.
yyyyy Side 2 keyThis is a PF (Programmable Function) key. Press itto activate its auxiliary function.
uuuuu °, •, 22222,33333 keysThese are PF (Programmable Function) keys.Press each key to activate its auxiliary function.
iiiii SP/MIC jacksConnect an optional speaker/ microphone here.
ooooo Display
Note: The PF keys are programmed with default functions:• Side 1 key: Lamp• Side 2 key: Monitor A• ° key: Scan• • key: Scan Del/Add• 22222 key: Talk Around• 33333 key: RF Power Lo
TK-272G
4
The "Add" channel is contained in the scan sequence, the"Delete" channel is not contained. In the scan mode, this keyswitches the channel between delete or add, temporarily.
13) Talk AroundPress this key, the transceiver uses the receive frequencyand tone for transmission.The operator can call the other party directly (withoutrepeater). Press this key again, the talk around functiongoes off.
14) NoneAn error operation beep sounds, and no action will occur.Use this function when the transceiver is required to beoperated more simply.
3. Display
OPERATING FEATURES
4) Home ChannelPress this key once, the channel switches to the pre-programmed home channel.
5) Key lockWhen the KEY LOCK switch is held down for one secondor more, keys other than [PTT], [Side1], [Side2], [VOL],[POWER], and KEY LOCK are locked.When 12/16 KEY LOCK is set with the FPU, the DTMFkey is locked and when front-panel KEY LOCK is set, theDTMF key and the [PF] key are locked.
6) LampThis key illuminates the LCD and keys on the front panel.When the key is pressed, the LED lamp goes on.When it is released, the lamp goes off after about fiveseconds. If any key is pressed while the LED lamp is on,the lamp is kept on for five seconds.
7) MonitorUsed to release signalling or squelch when operating inconventional mode. It is also used to reset option signalling.
8) Operator Selectable ToneThis key switches the pre-set decode QT/DQT and encodeQT/DQT to OST (Operator Selectable Tone) tone pair.Press this key, the transceiver enters OST mode. In thismode, the display shows "OFF" and the operator can selectone of the OST tone pair using the tuning control. The displayshows "TONE ∗∗" and tone pair No. ∗∗ is selected.Press OST key again, the transceiver exits from OST mode,and returns to the group/channel mode.16 tone pairs for OST can be programmed by KPG-56D.OST is useful to access the repeater with same radiofrequency and different tone (QT/DQT).
9) 2-Tone Encode Select1 Press the key programmed as 2-tone Encode Select.
• A pre-programmed 2-tone code name appears on thedisplay.
2 Press the key programmed as Rotary encoder to selectyou desired 2-tone code name.
3 Press PTT switch and 2-Tone Encode Select key to transmitand release them to receive.
10) RF power lowUsed to temporarily switch transmission output to low power.Turning the function on enables:
Hi→Low, Low→LowKey states are backed up, except in the PC mode whenthey are reset.
11) ScanPressing this key starts scanning. Pressing this key againstops scanning.
12) Scan Del/AddThis key switches the currently displayed channel between"Delete" and "Add".
4. Scan Operating1) Scan types Single Group Scan
You can scan all valid (ADD) channels in the displayed groupthat can be selected with the group selector.
Icon Description
Appears while using Smar Trunk.
Appears when the selected channel isbusy.Appears when QT, DQT, DTMF, or 2-Tone decoding is deactivated (bypressing the Monitor key).Appears when you receive a CodeSquelch, Selective Call, 2-Tone, orDTMF Signalling call. Also appearswhen you transmit using Code Squelchor Selective Call.
Appears while scanning.Appears when using low power on theselected channel.Appears when the selected channel isincluded in the scanning sequence.Displays the selected channel, thesquelch level, DTMF digits (whenentering digits, confirming digits, ormaking a call), and messages receivedvia Selective Call.
TK-272G
5
OPERATING FEATURES
Multiple Group ScanYou can scan all valid (ADD) channels in all valid (ADD)
groups.
2) Scan Start ConditionOne or more non-priority channels must be added to all
channels that can be scanned. The transceiver must be innormal receive mode (PTT off).
When you activate the key programmed to the scan function,scan starts. The scan icon ("SCN") lights and "SCAN" isindicated on display.
3) Scan Stop ConditionThe scan stops temporarily if the following conditions are
satisfied.1 The receiving signal matches the signalling code in your
radio that is set by the programming software (KPG-56D).2 When the Monitor key is depressed.
4) Scan Channel Types1 Priority channel is the most important channel for scan,
and always detects a signal during scan and when the scanstops temporarily.
2 Non-priority channels detect a signal during scan. For thechannels that can be selected with the group or channelselector when the scan does not occur, the "A" icon lights.
5) Priority Channel SettingA priority channel can be set as follows with the programming
software (KPG-56D).1 Specify a priority channel as a fixed priority channel.2 Make a selected channel a priority channel.
Specify the initial channel before the operator changes it.
6) Scan Type According to the Priority Channel1 When no priority channel is set : Only the non-priority
channels are scanned.If a non-priority channel stops temporarily, it stops untilthere is no signal on the channel.
2 When priority channel is set : Either priority channel isscanned.If a non-priority channel stops temporarily, a priority channelsignal is detected at certain intervals.If a priority channel stops temporarily, it stops until there isno signal on the priority channel.
7) Revert ChannelThe revert channel is used to transmit during scanning and
set by the programming software (KPG-56D).1 Priority
The transceiver reverts to the priority channel.2 Priority with talkback
The transceiver reverts to the priority channel.If you press PTT during a resume timer (dropout delay time,TX dwell time) or calling, you can transmit on the current
channel to answer to the call however revert channel is setto priority channel.After resume time, scan re-starts and the transmissionchannel returns to the priority channel.
3 Selected channelThe transceiver reverts to the channel before scanning orthe channel that you changed during scan.
4 Last called channelThe transceiver reverts to the last called channel duringscan.
5 Last used channelThe transceiver reverts to the last used (transmitted)channel during scan. "Last used" revert channel includestalkback function.
6 Selected with talkbackThe transceiver reverts to the channel before scanning orthe channel that you changed during scan.
8) Scan EndWhen you reactivate the key programmed to the scan
function during scan mode, scan ends.The scan icon ("SCN") and "SCAN" or revert channel
(programmable) display goes off.
9) Temporarily Delete/AddIt is possible to delete or add a channel temporarily during
scan. When scan stops on an unnecessary channel, forexample by interference of the other party, press the delete/add key, then that channel is deleted temporarily and scan willre-start immediately.
When you would like to add a deleted channel temporarilyto the scan sequence, select the desired (deleted) channelduring scan, and press the delete/add key before scan re-starts.
That channel is added temporarily to the scan sequence.The temporarily deleted or added channels are returned totheir pre-set delete/add conditions when the transceiver exitsfrom scan mode.
5. Details of Features1) Time-out timer
The time-out timer can be programmed in 15 secondsincrements from 15 seconds to 300. If the transmitter is keyedcontinuously for longer than the programmed time, thetransmitter is disabled and a warning tone sounds while thePTT button is held down. The alert tone stops when the PTTbutton is released.
2) PTT IDPTT ID provides a DTMF ANI to be sent with the PTT button
every time it is used (Begin of TX ID at beginning oftransmission, End of TX ID at end of transmission, or both).
You can program the PTT ID as one of the followings.Off, BOT (Begin of TX ID), EOT (End of PTT ID), BOTH.The contents of ID are programmed for each channel.
TK-272G
6
OPERATING FEATURES
6. Option Signalling (DTMF/2 tone)Built-in DTMF decoder is available for option signalling.Built-in 2-Tone decoder is available for option signalling.
It is possible to use individual call, group call, DBD (DeadBeat Disable). Note : DBD is only DTMF
Preset operation is triggered when there is a match withOption Signaling.
When Option Signaling matches on a Group Channelwhere it is set to Yes, the Option Signaling display flashesand Option Signaling is canceled. Settings after this will cause"Transpond" or "Alert" to sound.
Setting the Selective Call Alert LED will cause the LED tostart flashing orange.
Mute or Unmute is triggered by the ID/QT/DQT/Carrierwhen option signaling matches (when Option Signal isdeactivated by a transmission).
AND/OROption Signaling match conditions can be selected with
AND/OR logic.
Alert/Transpond AF Mute OpenAND Triggers at match with QT/ Triggers at match with QT/
DQT/ID+DTMF(2tone);Opt DQT/ID+DTMF(2tone);OptOR Triggers at match with Triggers only for match with
DTMF(2tone);Opt QT/DQT/ID;Signaling
Even if set as OR, there is no Alert/Transpond just withDTMF.
Even if set as OR, AF mute cannot be canceled just by amatch with DTMF.
In conventional channels not set with QT/DQT, signaling isa match just by receiving the carrier.
Auto ResetWhen Option Signaling matches on a Group channel where
it is set to Yes, Option Signaling is canceled when it matches agroup channel set to Yes.
After Option Signaling matches, Option Signaling canautomatically Reset after a specified time.
Dead Beat DisableWhen the D.B.D (Dead Beat Disable) code matches, a
preset operation is performed.When D.B.D matches on all group channels regardless of
whether Option Signaling = Yes/No, then TX Inhibit or TX RXInhibit is activated by the settings performed afterwards. D.B.Dis canceled when the D.B.D. code + "#" is received.
Transpond is always activated when the D.B.D codematches. Alert is not output. An Option Signaling match is notdisplayed.
The transceiver is capable of having ID. The format is DTMF.The t iming that the transceiver sends the ID is
programmable.Begin of TX ID (BOT) : Begin of TX ID is sent at the
beginning of transmission.End of TX ID (EOT) : End of TX ID is sent at the end of
transmission.Both : Begin of TX ID is sent at the beginning of transmission
and End of TX ID is sent at the end of transmission.There is also a "PTT ID" setting for each channel.
3) Battery WarningThis transceiver has a battery warning feature. If low voltage
is detected during transmission, the transceiver warns you bya flashing red "LED".
When the voltage is detected to be even lower duringtransmission, the transceiver stops transmission and warnsyou by a flashing red "LED" and a beep.
Please notice "indication" for the battery exchange, chargingtime by flashing red LED and beep.
4) "TOT" Pre-AlertThe transceiver has a "TOT" pre-alert timer. This parameter
selects the time at which the transceiver generates a "TOT"pre-alert tone before the "TOT" is expired.
"TOT" will expire when the selected time passes from theTOT pre-alert tone.
5) "TOT" Re-Key TimeThe transceiver has a "TOT" re-key timer. This timer is the
time you cannot transmit after the "TOT" is exceeded. Afterthe "TOT" re-key time expires you can transmit again.
6) "TOT" Reset TimeThe transceiver has a "TOT" reset timer. This timer is the
minimum wait time allowed during a transmission that will resetthe "TOT" count.
"TOT" reset time causes the "TOT" to continue even afterthe PTT is released, unless the "TOT" reset timer has expired.
7) OST (Operator Selectable Tone) The transceiver is capable of having the "OST" function
and 16 tone pairs (QT/DQT) with a max 10-digit name for eachtone pair.
8) Clear to TranspondThe transceiver waits for an acknowledment signal until the
channel free.This feature ensures the acknowledment signal is receive
by another party.
9) Battery SaveThis is the automatic battery saver during standby mode
operation. The receiver circuit is turned on and off to conservethe battery life.
TK-272G
7
OPERATING FEATURES / REALIGNMENT
7. Audible user feedback tonesThe transceiver outputs various combinations of tones to
notify the user of the transceiver operating state. The maintones are listed below
The high tone is 1477Hz, the mid tone is 941Hz, and thelow tone is 770Hz.
• Power on toneThis tone is output when the transceiver is turned on. (The
high tone is output for 500ms.)
• Alert toneThis tone is output when the transceiver is in TX inhibition
for TOT, battery warning and PLL unlocked. It is output untilthe PTT button is released. (The 697Hz tone is output.)
• Busy ToneThis informs the user of a busy channel lock out
2000Hz 2000Hz 2000Hz100ms 100ms 100ms 100ms 100ms
• Group Call ToneThe group call tone informs the user of a group call in DTMF/
2 Tone Option Signaling. This tone repeats 7 times.
• Individual ToneIndividual tone is issued on receiving selective call by DTMF/
2 Tone Option Signaling.
770Hz 770Hz30ms 30ms 30ms
• Pre Alert toneInforms the user when nearing transmit inhibit (transmit
cutoff) time due to TOT.The Pre Alert Tone is issued from the time set for TOT Pre
Alert until the TOT triggers.
1633Hz 1633Hz 1633Hz50ms 50ms 50ms 50ms 50ms
2. How to Enter Each ModeMode Operation
User mode Power ONPanel test mode [2]+Power ON (Two seconds)PC mode Received commands from PCPanel tuning mode [Panel test mode]+[°]Firmware programming mode [Side1]+[Side2]+Power ON
(Two seconds)Clone mode [Side1]+[3]+Power ON
(Two seconds)Self programming mode [Side1]+[•]+Power ON
(Two seconds)
REALIGNMENT
1. Modes
Mode FunctionUser mode For normal use.Panel test mode Used by the dealer to check the
fundamental characteristics.Panel tuning mode Used by the dealer to tune the radio.PC mode Used for communication between the
radio and PC (IBM compatible).Data programming Used to read and write frequency datamode and other features to and from the radio.PC test mode Used to check the radio using the PC.
This feature is included in the FPU.See panel tuning.
Firmware program- Used when changing the mainming mode program of the flash memory.Clone mode Used to transfer programming data
from one radio to another.Self programming Frequency, signalling and features.mode
User mode
Panel test mode
PC mode
Firmwareprogramming mode
Clone mode
Self programmingmode
Panel tuning mode
PC test mode
Data programmingmode
PC tuning mode
3. For the panel Test ModeFor the setting method, refer to ADJUSTMENT.
3-1. For the panel Tuning ModeFor the setting method, refer to ADJUSTMENT.
4. ChecksumExecuting this function, "TUNING" appears on the display
of TK-272G while calculating the checksum .When the calculation is completed, the display returns to
normal and PC displays the checksum of the radio.
Checksum
TK-272G
8
5. PC Mode5-1. Preface
The TK-272G transceiver is programmed using a personalcomputer, a programming interface (KPG-22) andprogramming software (KPG-56D).
The programming software can be used with an IBM PCor compatible. Figure 1 shows the setup of an IBM PC forprogramming.
5-2. Connection procedure1. Connect the TK-272G to the personal computer with the
interface cable.2. When the POWER is switched on, user mode can be
entered immediately. When the PC sends a command,the radio enters PC mode.When data is transmitted from transceiver, the red LED blinks.When data is received by the transceiver, the green LED blinks.
Notes:• The data stored in the personal computer must match the
model type when it is written into the flash memory.• Change the TK-272G to PC mode, then attach the interface
cable.
Fig. 1
IBM-PC
KPG-56D Gray SP
MIC
Gray/Black
1.5D-XV Lead wire
1.5D-XV Shield wire
Tuning cable(E30-3216-05)
KPG-22
RF Power meteror SSG -
+
-
+
REALIGNMENT
5-3. KPG-22 description(PC programming interface cable: Option)
The KPG-22 is required to interface the TK-272G to thecomputer. It has a circuit in its D-subconnector (25-pin) casethat converts the RS-232C logic level to the TTL level.
The KPG-22 connects the SP/MIC connector of the TK-272G to the computers RS-232C serial port.
5-4. Programming software descriptionThe KPG-56D programming disk is supplied in 3-1/2” disk
format. The software on this disk allows a user to program the TK-272G radios via a programming interface cable (KPG-22).
5-5. Programming with IBM PCIf data is transferred to the transceiver from an IBM PC
with the KPG-56D, the destination data (basic radioinformation) for each set can be modified. Normally, it is notnecessary to modify the destination data because their valuesare determined automatically when the frequency range(frequency type) is set.
The values should be modified only if necessary. Data canbe programmed into the flash memory in RS-232C format viathe universal connector.
KPG-56D installation manual part No. : B62-1153-XX
6. Firmware Programming Mode6-1. Preface
Flash memory is mounted on the TK-272G. This allows theTK-272G to be upgraded when new features are released inthe future. (For details on how to obtain the firmware, contactCustomer Service.)
6-2. Connection procedureConnect the TK-272G to the personal computer (IBM PC
or compatible) with the interface cable (KPG-22). (Connectionis the same as in the PC Mode.)
6-3. Programming1. Start up the programming software (KPG-56D), select
"firmware program" in the "Program" item, and press theReturn key on your personal computer. This starts up thefirmware programmer.
2. The top screen is displayed. Press any key to advance tothe next screen.
3. Set the communications speed (normally, 57600 bps) andcommunications port in the Setup item.
4. Set the firmware to be updated by File select (=F1).5. Hold down the [Side1] and [Side2] switches on the TK-272G,
and press the power switch.
When the [Side1] and [Side2] switches are held down for
two seconds, "PROG576" appears on the display and
the LED lights orange. When "PROG576" is displayed,
release the switches .6. Check the connection between the TK-272G and the
personal computer, and make sure the TK-272G is inProgram mode.
7. Press F10 on the personal computer. A window opens onthe display to indicate the writing progress. When the TK-272G begins to receive data, the LED lights green.
8. When data is received successfully, a checksum appears
on the display.9. If you want to continue programming other TK-272Gs,
repeat steps 5 to 8.
TK-272G
9
Notes: To start the Firmware Programmer from KPG-56D, the
Fpro path must be set up by the KPG-56D Setup. This mode cannot be entered if the Firmware Programming
mode is set to Disable in the Programming software (KPG-56D).
When programming the firmware, it is recommend to copythe data from the floppy disk to your hard disk before youupdate the radio firmware.Directly copying from the floppy disk to the radio may notwork because the access speed is too slow.
6-4. Function1. If you press the [Side2] switch while "PROGXXX" is
displayed, the checksum is displayed. If you press the[Side2] switch again (while the checksum is displayed),"PROGXXX" is redisplayed.
2. A transmission speed can be selected by pressing the [Side1]
switch while "PROGXXX" is displayed.
19200 bps: The LED flashes green and red alternately.
38400 bps: The LED flashes orange.
57600 bps: The LED lights orange.
Note:Normally, write in the high-speed mode.
7. Clone ModeProgramming data can be transferred from one radio to
another by connecting them via their SP/MIC connectors. Theoperation is as follows (the transmit radio is the master andthe receive radio is the slave).
1. Turn the master TK-272G power ON with the [Side1]+[3]keys held down. The TK-272G displays " CLONE ".
2. Power on the slave TK-272G.3. Connect the cloning cable to the SP/MIC connectors on
the master and slave.4. Press the [°] key on the master while the master displays
" CLONE ". The data of the master is sent to the slave.While the slave is receiving the data, "-PC-" is displayed.When cloning of data is completed, the master displays"END", and the slave automatically operates in the Usermode. The slave can then be operated by the same programas the master.
5. The other slave can be continuously cloned. When the [°]key on the master is pressed while the master displays"END", and the slave the master displays " CLONE ".Carry out the operation in steps 2 to 4.
Note: Use the new cloning cable for TK-272G.You cannot use the old cloning cable for TK-260/270.
REALIGNMENT
Fig. 2
Cloning cableφ 3.5
φ 2.5φ 3.5
φ 2.5
GNDREMOTE/TXD
PTT/RXD
8. Self Programming ModeWrite mode for frequency data and signalling etc. Mainly
used by the person maintaining the user equipment.
8.1 Self programming mode settingRemove D17 from the TX-RX unit (Figure 3). Hold downthe [Side1]+[] switches and turn the power switch on.When the self programming mode is entered, [SELF]appears on the display. The mode changes automaticallyto Model Select Mode and "PORTABLE" is displayed inabout one second.
Note :This mode (self programming mode) cannot be set when it
has been disabled with the FPU.
Note :Self programming is disabled if "a Trunking Board is installed
in this Radio" is selected in the FPU.
Fig. 3
D17
X57-587XCompoent Side
Note: You can clone the programmed data between thetransceiver frequency version must be same.
Cloning cable parts No.E30-3410-05 (TK-272G → TK-272G)
TK-272G
10
No. Function Choices Display Remarks5 Option Signaling OFF NONE____ Default
DTMF DTMF____2-TONE 2TONE___
6 ID 000- ___ID___ Display when an item is selected9999999999 (about 0.5 seconds)
12345678 Display of the current setting(If it is 8 or more digits, scroll it.)
——987 Display when a code is input(Input it with DTMF key.) *1
Blank ———— [Side1] : Data clear7 Busy Channel NO BCL_NO__ Default
Lockout YES BCL_YES BCL_YES for K, K2 type8 Beat shift No SHFT_NO_ Default
Yes SHFT_YES9 RF Power High Power PWR_H___ Default
Low Power PWR_L___10 Wide/Narrow Wide WIDE__
NARROW NARROW__11 Scan DELETE SCAN_DEL
Delete/ADD ADD SCAN_ADD Default12 Priority No P.CH_NO__ Not used when (Scan) Priority is not Fixed.
Channel Yes P.CH_YES_13 Home Channel No H.CH_NO__ Not used when Home Channel is
Yes H.CH_YES_ not set in Key Assignment.14 Compander No COMP_NO_
Yes COMP_YES15 PTT ID OFF P.ID_OFF
Begin of TX P.ID_1End of TX P.ID_2Both P.ID_3
16 Begin of 000- _BOT_ID_ Not valid if Dial ID =Disable andTX ID 9999999999999999 PTT ID=OFF, or EOT is set.
Display when an item is selected(about 0.5 seconds)
12345678 Display of the current setting(If it is 8 or more digits, scroll it.)
——987 Display when a code is input(Input it with DTMF key.) *1
Blank ———— [Side1] : Data clear17 END of 000- _EOT_ID_ Not valid if Dial ID =Disable and
TX ID 9999999999999999 PTT ID=OFF, or EOT is set.Display when an item is selected(about 0.5 seconds)
12345678 Display of the current setting(If it is 8 or more digits, scroll it.)
——987 Display when a code is input(Input it with DTMF key.) *1
Blank ———— [Side1] : Data clear
8-2. Channel Setting ModeThis is a mode for making channel settings with the panel
keys without using the FPU.
Pressing [Side2] when "SELF" is displayed, sets ChannelSetting Mode.Select an item set using [3] then change the selection withthe encoder.The data displayed using [2] is stored in the memory andthen proceeds to the next item. Pressing [3] proceeds tothe next item without storing it in the memory.Press [Side2] to set the display to "SELF" and return to reset(default) status.All channel data is cleared when pressing [2] key with theblank RX frequency.
No. Function Choices Display RemarksSelect 1-128 _1-_1._ We recomend up to 32 CHChannel _1-128._ for TK-272G.
1 RX frequency Step 2.5kHz-1MHz STP_250 Display when an item is selectedSTP_1000 or when a step is changed
(about 0.5 seconds)[•] Step changeVHF : 2.5, 5.0,6.25,7.5kHz,1MHz,Step
Blank R. ———— [Side1] : Freq On/Blank switching100.0000- R.100.0000 The rightmost dot indicates550.0000MHz 50Hz digit (On=5; Off=0).
2 Rx Signaling OFF ———— [Side1] : Off/QT/DQT switchingQT 67.0-250.3Hz QT_67.0_ [•] : Mode switching(EIA Mode) QT_250.3_ [°] : Normal/InverseQT 67.0-250.3Hz QT_67.0* switching(0.1Hz Step Mode) QT_250.3*DQT 000-777 (Normal) DQT000N*(1 Step Mode) DQT777N*DQT 023-754 (Normal) DQT023N(Standard Table Mode) DQT754NDQT 000-777 (Inverse) DQT000I*(1 Step Mode) DQT777I*DQT 023-754 (Inverse) DQT023I(Standard Table Mode) DQT754I
3 TX frequency Step 2.5kHz-1MHz STP_250 Same as RX frequency.STP_1000
Blank T. ————100.0000- T.100.0000550.0000MHz
4 TX Signaling Same as RX signaling.
*1. There is no keys, so it can’t be changed.
REALIGNMENT
Radio type
[Side2]
Function set mode
Self programming mode
[2]
[Side1]
Channel set mode
Flow Chart
TK-272G
11
REALIGNMENT
Flow Chart
Self programming mode
Channel Setting Mode
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
[Side2]
Channel set mode Channel selection
[2] Channel Delete
OFF
OFF
OFF
QT DQT N DQT I
OFF QT DQT N DQT I
[Side2]
RX frequency
RX signaling
[2]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1][Side1]
[Side1]
[Side1]
Data clear[Side1]
Data clear[Side1]
Data clear[Side1]
[Side1]
[ ]
TX signaling
TX freguency
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
option signaling
ID
Scan delete/add
Busy channel lockout
RF Power High/Low
Best Shift yes/no
Wide/Narrow
Compander yes/no
Not used when (Scan) Priority is not Fixed.
Not used when Home Channel is not set in key Assignment.
PTT ID
Priority channel
Home channel
Begin of TX ID
End of TX ID
[ ]
Not valid if Dial ID=Disableand PTT ID=off, or EOT is set.
Not valid if Dial ID=Disableand PTT ID=off, or BOT is set.
8-3. Function Setting ModeThis is a mode for using the panel keys to make function
settings without using the FPU, that operate on all channels.
Pressing the [Side1] when "SELF" is displayed, sets theFunction Setting Mode.Select an item set using [3] then change the selection withthe encoder.The data displayed using [2] is stored in the memory andthen proceeds to the next item. Pressing [3] proceeds tothe next item without storing it in the memory.Press [Side1] to display "SELF" and return to reset (default)status.
Function Setting Mode
No. Function Choices Display RemarksFunction Key
1 [Side1] No Function LAMP_OFF Default
Talk Around LAMP_3
Display Character LAMP_5
Home Channel LAMP_7
Channel Down LAMP_8
Channel Up LAMP_9
Keylock LAMP_10
Lamp LAMP_11 Default
2-Tone Encode LAMP_16
Select
Monitor A LAMP_17
Monitor B LAMP_18
Monitor C LAMP_19
Monitor D LAMP_20
RF Power Low LAMP_21
Scan LAMP_22
Scan DEL/ADD LAMP_23
Operator LAMP_27
Selectable Tone
2 [Side2] No Function MON_OFF
Talk Around MON_3
Display Character MON_5
Home Channel MON_7
Channel Down MON_8
Channel Up MON_9
Keylock MON_10
Lamp MON_11
2-Tone Encode MON_16
Select
Monitor A MON_17 Default
Monitor B MON_18
Monitor C MON_19
Monitor D MON_20
TK-272G
12
No. Function Choices Display Remarks
REALIGNMENT
No. Function Choices Display Remarks
2 [Side2] RF Power Low MON_21
Scan MON_22
Scan DEL/ADD MON_23
Operator MON_27
Selectable Tone
3 [°] No Function KEY1_OFF
Talk Around KEY1_3
Display Character KEY1_5
Home Channel KEY1_7
Channel Down KEY1_8
Channel Up KEY1_9
Keylock KEY1_10
Lamp KEY1_11
2-Tone Encode KEY1_16
Select
Monitor A KEY1_17
Monitor B KEY1_18
Monitor C KEY1_19
Monitor D KEY1_20
RF Power Low KEY1_21
Scan KEY1_22
Scan DEL/ADD KEY1_23 Default
Operator KEY1_27
Selectable Tone
4 [•] No Function KEY2_OFF
Talk Around KEY2_3
Display Character KEY2_5
Home Channel KEY2_7
Channel Down KEY2_8
Channel Up KEY2_9
Keylock KEY2_10
Lamp KEY2_11
2-Tone Encode KEY2_16
Select
Monitor A KEY2_17
Monitor B KEY2_18
Monitor C KEY2_19
Monitor D KEY2_20
RF Power Low KEY2_21
Scan KEY2_22
Scan DEL/ADD KEY2_23
Operator KEY2_27
Selectable Tone
5 [2] No Function KEY3_OFF
Talk Around KEY3_3 Default
Display Character KEY3_5
Home Channel KEY3_7
Channel Down KEY3_8
5 [2] Channel Up KEY3_9
Keylock KEY3_10
Lamp KEY3_11
2-Tone Encode KEY3_16
Select
Monitor A KEY3_17
Monitor B KEY3_18
Monitor C KEY3_19
Monitor D KEY3_20
RF Power Low KEY3_21 Default
Scan KEY3_22
Scan DEL/ADD KEY3_23
Operator KEY3_27
Selectable Tone
6 [3] No Function KEY4_OFF
Talk Around KEY4_3
Display Character KEY4_5
Home Channel KEY4_7
Channel Down KEY4_8
Channel Up KEY4_9
Keylock KEY4_10
Lamp KEY4_11
2-Tone Encode KEY4_16
Select
Monitor A KEY4_17
Monitor B KEY4_18
Monitor C KEY4_19
Monitor D KEY4_20
RF Power Low KEY4_21 Default
Scan KEY4_22
Scan DEL/ADD KEY4_23
Operator KEY4_27
Selectable Tone
7 [CH] Channel Up/Down CH_UP/DN Default
No Function KNOB_OFF
Optional Feature
8 Power On Tone YES/NO PONT_YES Default:YES
9 Control Tone YES/NO CNTT_YES Default:YES
10 Warning Tone YES/NO WART_YES Default:YES
11 Time Out Timer OFF,15-300/15s Step TOT_60 Default:60s
12 TOT OFF,1-10/ TOTP_PFF Cannot be set when TOT is OFF.
Pre-Alert Time 1s Step Default:OFF
13 TOT OFF1-60/ TOTK_OFF Cannot be set when TOT is OFF.
Rekey Time 1s Step Default:OFF
14 TOT OFF1-15/ TOTS_OFF Cannot be set when TOT is OFF.
Reset Time 1s Step Default:OFF
15 Clear to Transpond YES CTT_YES
(BCL for Transpond) NO CTT_NO Default
TK-272G
13
No. Function Choices Display Remarks
8-4. Memory Reset ModeThis mode is used to clear data for functions that can be set
in Self Programming Mode or to return to reset values (default).Pressing [°] when "SELF" is shown, sets the display to
"CANCEL".Turning the encoder alternately switches the display
between "CANCEL" "READY".Pressing [°] when "READY" is shown, clears the data and
sets the display to "CLEAR".Pressing [°] again, returns the display to "SELF".Pressing [°] when "CANCEL" is shown, returns the display
to "SELF" without resetting the data.
When the memory is reset, mode data and model data are
not reset.
16 Battery Save ON BATT_ON Default
OFF BATT_OFF
17 Signaling OR SIG__OR Default
AND SIG_AND
18 Squelch Level 0-9/1 Step SQL__5 Default;5
19 Priority None PRI_NONE Default
Fixed PRI_FIX_
Selected PRI_SEL_
20 Lock Back 0.5-5.0/0.05 LBA_500 Default:500ms Cannot be
Time A set when Priority = none.
21 Lock Back 0.5-5.0/0.05 LBB_2000 Default:2000ms Cannot
Time B be set when Priority = none.
22 Revert Selected REV_SEL
Channel Last Called REV_L/C_ Default
Last Used REV_L/U_
Selected + Talk Back REV_S/T_
Priority REV_PRI_
Priority + Talk Back REV_P/T_
23 Dropout 0-300/1s DODT___3 Default;3s
Delay Time
24 Dwell Time 0-300/1s DWL___3 Default;3s
DTMF
25 Digit Time 50-200/10ms DIGT__50 Default;50ms
26 Inter Digit Time 50-200/10ms IDT___50 Default;50ms
27 First Digit Time 50-200/10ms FDT___50 Default;50ms
28 First Digit Delay 100-1000/50ms RIST_100 Default;100ms
29 Rise Time with QT 100-1000/50ms RTWQ_100 Default;100ms
30 DIAL ID Enable DID_ENA *1
Disable DID_DIS Default
31 No.of 12Key NODK_12 Default *1
DTMF Key 16Key NODK_16 *1
32 DTMF Hold Time ON DHT__ON Default *1
OFF DHT__OFF
33 Store and Send Enable SAS__ENA *1
Disable SAS__DIS Default
34 D Key D Code DKA_D_CD Default
Assignment 1-16/1s DKA_16__
35 DTMF Code SQ DTMS_CSQ Default
Signaling SEL CALL DTMS_SEL
36 Inter Mediate 0-9,A-D,*,# IMC__#_ Default: # (Can be set only when
Code DTMF signaling = SEL CALL.)
37 Group Code A-D,*,# GPCD_OFF_ Default;OFF
38 Auto Rest OFF ART_OFF_
Time 1-15/1s ART__10 Default;10s
39 Call Alert/ OFF CA/T_OFF Default
Transpond Call Alert CA/T_C/A
Transpond CA/T_T/A
(Call Alert)
REALIGNMENT
No. Function Choices Display RemarksTranspond CA/T_T/I
(ID Code)
Transpond CA/T_T/T
(tanspond Code)
Others
40 Panel Test/panel Enable PTM_ENA Default
Tuning MODE Disable PTM_DIS
*1. This function is not available on TK-272G.
TK-272G
14
Flow Chart
Self programming mode
Function Setting Mode
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
Function set mode
[Side1]
[Side1] key function
[MON] key function
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2]/[3]
[2] key function
[3] key function
[CH] key function
Time Out Timer
T.O.T. Pre-alert time
T.O.T. Rekey time
T.O.T. Reset time
Power on tone yes/no
Contorol tone yes/no
WArning tone yes/no
Battery Save on/off
Clear to Transpond
Signaling
Priority[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
Look back time A
Look back time B
Revert channel
Dropout delay time
Dwell time
Digit time
First digit time
Inter digit time
First digit delay
Rise time with QT
Dial ID
DTMF hold time
No. of DTMF key
D key assignment
DTMF signaling
Inter mediate code
Group code
Auto reset time
Call alert/Transpond
[Side1]
[Side1]
[Side1]
[Side1]
Store & Send
Squelch level
Panel test/Panel tuningmode
[ ] key function
[ ] key function
REALIGNMENT
TK-272G
15
DISASSEMBLY FOR REPAIR
Separating the case assembly from the chassis.1. Remove the two knobs z and three round units x.2. Remove the two screws c.3. Expand the right and left sides of the bottom of the case
assembly, lift the chassis, and remove it from the caseassembly v.
4. Taking cure not to cut the speaker lead b, open the chassis
and case assembly, and pull the speaker lead with
connector n.
Separating the chassis from the unit.1. Remove the three screws ..
Lift the unit (X54), and rise up the connecter lever in thearrow with your finger /.Remove the three hexagonal bosses , and remove the
twelve screws m.2. Remove the solder from the antenna terminal using a
soldering iron, then lift the unit off (X57).
❹
❸❸
❷❶
❷❶
❷
b
n
Antenna teminal
X54-
X57-
X57-
❾❿
➐
❽
❾
❾
❽
❽
➐
➐➐
➐ ➐➐
➐➐
➐
➐
➐
TK-272G
16Fig. 3 Wide/Narrow changeover circuit
CIRCUIT DESCRIPTION
1. Frequency configurationThe receiver utilizes double conversion. The first IF is 49.95
MHz and the second IF is 450 kHz. The first local oscillator
signal is supplied form the PLL circuit.
The PLL circuit in the transmitter generates the necessary
frequencies. Fig. 1 shows the frequencies.
Fig. 1 Frequency configuration
1) Front end (RF AMP)The signal coming form the antenna passes through thetransmit/receive switching diode circuit, (D3,D7) passesthrough a BPF(L307), and is amplified by the RF amplifier(Q301).The resulting signal passes through a BPF (L305 and L306)and goes to the mixer. These BPFs are adjusted by variablecapacitors (D302, 303,305). The input voltage to thevariable capacitor is regulated by voltage output from themicroprocessor (IC13)
2) First mixerThe signal from the front end is mixed with the first localoscillator signal generated in the PLL circuit by Q19 toproduce a first IF frequency of 49.95 MHz.The resulting signal passes through the XF1 MCF to cutthe adjacent spurious and provide the opit imuncharacteristics, such as adjacent frequency selectivity.
Fig. 2 Receiver section
2. ReceiverThe frequency configuration of the receiver is shown in Fig. 2.
5R
Q14
Q17D14
R78
R75
C26
3
C26
5
R80
D13
Q23R98
R10
8
C13
3C
D1
R79
W/N "H" : Wide"L" : NarrowM
XO
IFI
MX
I
IFOAFO IC4
FM IF SYSTEM
Q22
5R
W/N
C10
7
R74
C10
8
CF1
CF2
R81
QA
D
R105
3) IF Amplifier circuitThe first IF signal is passed through a four-pole monolithiccrystal filter (XF1) to remove the adjacent channel signal.The filtered first IF signal is amplified by the first IF amplifier(Q22) and then applied to the lF system IC (IC4). The IFsystem IC provides a second mixer, second local oscillator,limiting amplifier, quadrature detector and RSSI (ReceivedSignal Strength Indicator). The second mixer mixes thefirst IF signal with the 50.4MHz of the second local oscillatoroutput (TCXO X3) and produces the second IF signal of450kHz.The second IF signal is passed through the ceramic filter(CF1; Wide (without E), CF2 ; Narrow and E type) to removethe adjacent channel signal. The filtered second IF signalis amplified by the limiting amplifier and demodulated bythe quadrature detector with the ceramic discriminator(CD1). The demodulated signal is routed to the audiocircuit.
4) Wide/Narrow changeover circuitNarrow and Wide settings can be made for each channelby switching the ceramic filters CF1 (Wide) and CF2(Narrow).The WIDE (high level) and NARROW (low level) data isoutput from IC5 (OUTPUT EXPANDER), pin 4.When a WIDE (high level) data is received, Q14 turn offand Q17 turn on. When a NARROW (low level) data isreceived, Q14 turn on and Q17 turn off. D14 and D13 areswitched to ceramic filters when a high/low level data isreceived.Q23 turns on/off with the Wide/Narrow data and the IC4detector output level is changed to maintain a constantoutput level during wide or narrow signals.
ANTTX/RX : 150~174MHz (K)TX/RX : 136~150MHz (K2)
ANTSW
RFAMP
PAAMP
TXAMP
MCF
49.95MHz 50.4MHz
CF450kHz
IFSYSTEM
AFAMP
SP
RX : 199.95~223.95MHz (K)RX : 185.95~199.95MHz (K2)
RX : 399.9~447.9MHz (K)RX : 371.9~399.9MHz (K2)
TX : 300~348MHz (K)TX : 272~300MHz (K2)
16.8MHz
PLLVCO
X3multiply
TCXO
MICAMP MIC
TX : 150~174MHz (K)TX : 136~150MHz (K2)
1/2DIVIDER
IC4IF, MIX, DET
AF AMPIC16 (2/2)
1/2DIVDER
PLLVCO
5DE-EMP MUTEEXP
HPF LPF HPF BEFIC14 2 1
41
SPAF AMP
IC11AF AMPIC15(2/2) AF VOL
ANTSW
RF AMPQ301
L307D303BPF
L306,305D302.305
BPFANTMIXER
Q19
TUNE
IC301
TUNE
IF AMPQ22
MCFXF1
CF1 : Wide
CF2 : Narrow
1st Local
X3 multiplyQ12 TCXO
2nd Local
TK-272G
17
CIRCUIT DESCRIPTION
Fig. 4 AF Amplifier and Squelch
Fig. 5 PLL circuit
5) Audio amplifier circuitThe demodulated signal from IC4 is amplified by IC16 (2/2), high-pass filtered, low-pass filtered, high-pass filtered,band-eliminate filtered, and de-emphasized by IC14.The signal then goes through an AF amplifier IC15 (2/2),an AF volume control (VR2), and is routed to an audiopower amplifier (IC11) where it is amplified and output tothe speaker.
6) SquelchPart of the AF signal from the IC enters the FM IC (IC4)again, and the noise component is amplified and rectifiedby a filter and an amplifier to produce a DC voltagecorresponding to the noise level.The DC signal from the FM IC goes to the analog port ofthe microprocessor (IC13). IC13 determines whether tooutput sounds from the speaker by checking whether theinput voltage is higher or lower than the preset value.To output sounds from the speaker, IC6 sends a high signalto the SP MUTE line and turns IC11 on throughQ32,Q33,Q34 and Q30.(See Fig. 4)
7) Receive signaling(1) QT/DQT
300Hz and higher audio frequencies of the output signalfrom IF IC are cut by a low-pass filter (IC19). The resultingsignal enters the microprocessor (IC13). IC13 determineswhether the QT or DQT matches the preset value, andcontrols the SP MUTE and the speaker output soundsaccording to the squelch results.
(2) 2-TONEPart of the received AF signal output from the AF amplifierIC16(2/2), and then passes through an audio processor(IC14), goes to the other AF amplifier IC15(1/2), iscompared, and then goes to IC13. IC13 checks whether 2-TONE data is necessary. If it matches, IC13 carries out aspecified operation, such as turning the speaker on. (SeeFig. 4)
DET
IC13CPU
IF AMPIC16 (2/2)IF AMP
IC19LPF
QT/DQT
2TN
2-TONE
IC15 (1/2)COMPARATER
IC18DTMFDECODE
PD, CLK, SD,STD
93A
NS
QL
TO
I95
FM IF IC4
5
43
Q36SW
Q32, 33, 34SW
DE-EMP MUTEEXP
HPF LPF HPF BEFIC14 2 1
IC15 (2/2)AF AMP
41
IC11AF PA AMP
Q30SW SP
OUTPUTEXPANDER
IC6
5RC
SP
MU
TE
5
7
3
PLL DATA
16.8MHz
REF OSC
I/M
I/N
PLL IC IC2
PHASECOMPARATOR
CHARGEPUMP
LPF
5kHz/6.25kHz
D2, 4
D9, 11
Q2TX VCO
Q10RX VCO
Q3BUFF AMP
Q4RF AMP
Q1RF AMP
Q7, 8T/R SW
5kHz/6.25kHz
(3) DTMFThe DTMF input signal from the IF IC(IC4) is amplified byIC16(2/2) and goes to IC18, the DTMF decoder. The decodedinformation is then processed by the CPU. Duringtransmission and standby, the DTMF IC is set to the powerdown mode when the PD terminal is High. When the line isbusy, the PD terminal becomes Low, the power down modeis canceled and decoding is carried out.
3. PLL frequency synthesizerThe PLL circuit generates the first local oscillator signal forreception and the RF signal for transmission.
1) PLLThe frequency step of the PLL circuit is 5 or 6.25kHz.
A 16.8MHz reference oscillator signal is divided at IC2 by afixed counter to produce an oscillator (VCO) output signal whichis buffer amplified by Q3 then divided in IC2 by a dual-moduleprogrammable counter. The divided signal is compared inphase with the 5 or 6.25kHz reference signal from the phasecomparator in IC2. The output signal from the phasecomparator is filtered through a low-pass filter and passed tothe VCO to control the oscillator frequency.(See Fig. 5)
2) VCOThe operating frequency is generated by Q2 in transmit
mode and Q10 in receive mode. The oscillator frequency iscontrolled by applying the VCO control voltage, obtained fromthe phase comparator, to the varactor diodes (D2 and D4 intransmit mode and D9 and D11 in receive mode). The T/R pinis set high in receive mode causing Q7 and Q8 to turn Q2 offand Q10 on.
The T/R pin is set low in transmit mode. The outputs fromQ10 and Q2 are amplified by Q3 and sent to the bufferamplifiers.
The outputs from Q3 to Q4 is divided into 1/2 in passingthrough a Divider IC (IC301), and goes to the RF amplifiers.
TK-272G
18
CIRCUIT DESCRIPTION
Fig. 7 Microphone amplifier
Fig. 8 Drive and final amplifier and APC circuit
3) UNLOCK DETECTORIf a pulse signal appears at the LD pin of IC2, an unlockcondition occurs, and the DC voltage obtained form D1,R1, and C6 causes the voltage applied to the microprocessorto go low. When the microprocessor detects this condition,the transmitter is disabled, ignoring the push-to-talk switchinput signal.(See Fig. 6)
Fig. 6 Unlock detector circuit
4. Transmitter System1) Microphone amplifier
The signal from the microphone passes through the limitercircuit in D23, and through the high-pass filter, the ALCcircuit, the low-pass filter, the high-pass filter, and pre-emphasis/IDC circuit IC14. When encoding DTMF, the muteswitch (Q35) is turned OFF for muting the microphone inputsignal.The signal passes through the D/A converter (IC17) for themaximum deviation adjustment, and goes to the VCXOmodulation input.
IC2
LD
PLL IC
D1
C6
R1
5C
IC13
UL
CPU
12HPF LPF HPF IDCPRE
EMPALC COMP
SW
LIMIT
D23MICIC14 15 16 18 19
Q35MUTE
DTMF/2 TONE
9 8
6
D/A
IC13CPU
IC17
QT/DQT
IC15(2/2)
2
TOTCXO20
TOVCO22
VCO
AFAMP
TCXO
(RX Audio)
LPF LPF
LPF
X1
DTMF/ 2 TONE
3) APC circuitThe APC circuit always monitors the current flowing throughthe RF power amplifier (IC1) and keeps a constant current.The voltage drop at R56, R57 and R58 is caused by thecurrent flowing through the RF power amplifier and thisvoltage is applied to the differential amplifier IC3(1/2).IC3(2/2) compares the output voltage of IC3(1/2) with thereference voltage from IC13, and the output of IC3(2/2)controls the VGG of the RF power amplifier to make bothvoltages the same.The change of power high/low is carried out by the changeof the reference voltage.
4) Encode signaling(1) QT/DQTQT,DQT data of the TOTCXO Line is output form pin 20 ofthe CPU. The signal passes through a low-pass CR filterand goes to the TCXO(X1).The QT,DQT data of the TOVCO Line is output form pin 22of the CPU. The signal passes through a low pass CR filter,mixes with the audio signal, and goes to the VCO modulationinput. TX deviation is adjusted by the CPU. (See fig.7)
(2) DTMF/2 TONEHigh-speed data is output from pin 2 of the CPU. The signalpasses through a low-pass CR filter, and provides a TXand SP out tone, and is then applied to the audio processor(IC14). The signal is mixed with the audio signal and goesto the VCO.TX deviation is adjusted by the CPU. (See fig.7)
5. Power supplyThere are five 5V power supplies for the microprocessor:5V,5M,5C,5R, and 5T. 5V is always output while the poweris on. 5M is always output, but turns off when the power isturned off to prevent malfunction of the microprocessor.5C is a common 5V and is output when SAVE is not set toOFF.5R is 5V for reception and output during reception.5T is 5V for transmission and output during transmission.
2) Drive and Final amplifierThe signal from the T/R switch (D5 is on) is amplified by thedrive amplifier (Q6) to 50mW.The output of the drive amplifier is amplified by the RF poweramplifier (IC1) to 5.0W (1W when the power is low). TheRF power amplifier consists of two MOS FET stages. Theoutput of the RF power amplifier is then passed through theharmonic filter (LPF) and antenna switch (D3 is on) andapplied to the antenna terminal.
FromT/R SW
(D5)DRIVEAMP
RFPOWER AMP LPFANT
SW
D3
ANT
VGG
Q6 IC1
VDD
R56
R57
R58
+B
IC3(1/2)
IC3(2/2)
APC(IC13)
TK-272G
19
CIRCUIT DESCRIPTION
Low battery warning
The red LED flashes duringtransmission.
The red LED flashes and acontinuous beep soundswhile PTT is pressed.
Battery condition
The battery voltage is low butthe transceiver is still usable.
The battery voltage is low andthe transceiver is not able tomake calls.
6. Control CircuitThe control circuit consists of a microprocessor (IC13) and
its peripheral circuits. It controls the TX-RX unit and transfersdata to and from the display unit. IC13 mainly performs thefollowing:
(1) Switching between transmission and reception by thePTT signal input.
(2) Reading system, group, frequency, and program datafrom the memory circuit.
(3) Sending frequency program data to the PLL.(4) Controlling squelch on/off by the DC voltage from the
squelch circuit.(5) Controlling the audio mute circuit by the decode data input.(6) Transmitting tone and encode data.
1) Frequency shift circuitThe microprocessor (IC13) operates at a clock of9.8304MHz. This oscillator has a circuit that shifts thefrequency by BEAT SHIFT SW (Q31).
2) Memory circuitMemory circuit consists of the CPU (IC13) and a flashmemory (IC12). A flash memory has a capacity of 2M bitsthat contains the transceiver control program for the CPUand data such as transceiver channels and operatingfeatures.This program can be easily written from an external device.Data, such as DTMF memories and the operating status,are programmed into the EEPROM (IC10).
Flash MemoryNote : The flash memory holds data such as written with theFPU (KPG-56D), and firmware program (User mode, Testmode, Tuning mode, etc.). This data must be rewritten whenreplacing the flash memory.
EEPROMNote : The EEPROM stores tuning data (Deviation, Squelch,etc.).Realign the transceiver after replacing the EEPROM.
Fig. 9 Memory circuit
IC13
IC12
CPU
IC10
EEPROM
FLASH
3) Low battery warningThe battery voltage is monitored by the microprocessor
(IC13). When the battery voltage falls below the voltage set bythe Low Battery Warning adjustment, the LED flashes red tonotify the operator that it is time to replace the battery. If thebattery voltage falls even more (approx. 5.8V), a beep soundsand transmission is stopped.
7. Optional Board TerminalTerminals for mounting the option board are provided at
the bottom edge of the TX-RX unit. The table below shows thecorrespondence between the board and terminals.
Optional Board Terminal Function (CN5)Pin Name I/O Function1 GND - GND2 SB O Power output after power switch3 AUX3 I/O Board control4 TXAFI I Modulation output from board5 AUX2 I/O Board control6 AUX6 O Board control7 AUX1 I Board control8 AUX5 O Board control9 AUX4 O Board control10 TXAFO O Modulation input to board11 5C O 5V12 RXAFO O Received signal input to board13 NC - NC14 RXAFI I Received signal output from board15 NC - NC16 ALTTONE I ALART TONE output form board17 NC - NC18 NC - NC19 NC - NC20 GND - GND
TK-272G
20
CIRCUIT DESCRIPTION/SEMICONDUCTOR DATA
Fig. 10 Control system
8. CONTROL SYSTEMKeys and channel selector circuit.The signal from the keys and channel selector are directly
input to the microprocessor, as shown in fig. 10.
SEMICONDUCTOR DATA
LCD Driver : LC75823W (Display UNIT IC501) Block diagram
LATCH & DRIVER
SHIFT REGISTER
COMMONDRIVER
ADDRESSDETECTOR
CLOCKGENERATOR
VDDCECLDI VSS
OSC
INH
VDD2
VDD1
COM1 COM2 COM3 S52 S51 S1
Pin No. Name I/O Active Function
1-52 S1-S52 O - Segment output for displaying datatransferred form serial data.
53-55 COM1-COM3 O - Common drive output.Frame frequency fo=(fosc/384)Hz
56 VDD - -The display to turn off
57 INH I L INT=L : Turn offINT=H : Turn onApply 2/3 the LCD drive bias voltage
58 VDD1 I - from outside. If 1/2 the bias is applied,connect to VDD2.Apply 1/3 the LCD drive bias voltage
59 VDD2 I - from outside. If 1/2 the bias is applied,connect to VDD1.
Pin function
60 VSS - -61 OSC I/O - Oscillation terminal
62 CE I H Chip enable. Serial data transfer terminal.Connected to the microprocessor.
63 CL I Synchronizing clock. Serial data transfer terminal.Connected to the microprocessor.
64 DI I - Transfer data. Serial data transfer terminal.Connected to the microprocessor.
Pin No. Name I/O Active Function
UPB1509GV (IC301) Pin connection diagram
1
2
3
4
5
6
7
8
D Q
Q
CLK
D Q
Q
CLK
D Q
Q
CLK OUTIN
IN
SW1 SW2
Pin No. Pin Name
1 VCC1
2 IN
3 IN
4 GND
5 SW1
6 SW2
7 OUT
8 VCC2
Block diagram
Pin Pin Applied PinFunctions and uses
No. name voltage voltage1 VCC1 2.2-2.5 - Power supply voltage pin for the input amplifier section and
division circuit. Connect a bypass capacitor to this pin to reducethe high-frequency impedance with the ground (for example, 1000 pF).
2 IN - 1.7-4.95 Signal input pin. Connect a coupling capacitor to this pin forDC cutting with an external circuit (for example, 1000 pF).
3 IN - 1.7-4.95 Input signal bypass pin. Connect a bypass capacitor to thispin to reduce the high-frequency impedance with the ground(for example, 1000 pF).
4 GND 0 - Ground pin. Connect it with the ground pattern. The groundpattern on the PC board should be wide enough to minimizeimpedance.
5 SW1 H/L - Division ratio setting pin. The division ratio can be set by thefollowing voltage:
6 SW2 Connect a bypass capacitor to this pin to reduce the high-frequency impedance with the ground.
7 OUT - 1.0-4.7 Division signal output pin. Emitter follower output. 0.1 Vpf ormore can be output under 200-ohmload. Connect a couplingcapacitor to this pin for DC cutting with an external circuit(for example,1000 pF).
8 VCC2 2.2-5.5 - Power supply voltage pin for the output buffer circuit. Connecta bypass capacitor to this pin to reduce the high-frequency impedance with the ground (for example, 1000 pF).
SW2H L
SW1H 1/2 1/4L 1/4 1/2
Pin Function
Channel selector
IC13 -COM
CN501
CN1
EN1
87
3
25
EN3
EN2
KO
UT
0
KO
UT
1
KO
UT
2
KO
UT
3
KIN
0
KIN
1
KIN
2
KIN
3
KIN
4
16
27
KEYAD
PTT
MONISW
LAMPSW
PTTSW
5M
47k
47k
100k
TK-272G
21
SEMICONDUCTOR DATA
Microprocessor : 30622M4102GP (TX-RX UNIT : IC13) Pin function
1 APC OTX:Automatic Power Control data outputRX:BPF tuning data
2 DTMF O DTMF/2TONE BEEP output3 2TN I 2TONE decode pulse input4 DTMSTD I DTMF decode detect detect:H5 SIM I Destination select6 BYTE I +5V(5M)7 CNVSS I GND8 AFSTB O Base Band IC strobe/rest output9 AFFCLK O Base Band IC frame rest/system reset output
10 RESET I Reset11 XOUT O Clock output12 VSS - GND13 XIN I Clock input14 VCC - +5V15 NC I NC16 EN2 I Encoder pulse input 2
17 AUX3 I/OOption board port 3 *Smar Trunk:Clock output *E Trunk: Step pulse input
18 INT I Battery voltage monitor input Low battery:L19 OE I Not used20 TOTCXO I QT/DQT modulation output(TCXO)21 EEPDAT I/O EEPROM data input/output22 TOVCO O QT/DQT modulation output(VCO)
23 AUX1 IOption board port 1 *Smar Trunk:Req/Ack input *E Trunk: TX Request input
24 SFTSTB O Shift register strobe output25 EN1 O Encoder pulse input 126 DACS I Chip select output(Max dev) Select:L27 EN3 I CH selector input (TK-260G)28 NC O NC29 AUX4 O Option board port 4 *Smar Trunk:
Data output
30 AUX2 I/OOption board port 2 *Smar Trunk:Data input *E Trunk: Synchronizing input
31 KOUT3 O Key scan output 332 KOUT2 O Key scan output 233 TXD O Serial data34 PTT/RXD I PTT on: L/Serial data35 KOUT1 O Key scan output 136 KOUT0 O Key scan output 037 RDY - Not used38 ALE O Not used39 HOLD I Not used40 HLDA O Not used41 BLCK O Not used42 RDY O READ signal43 BHE O Not used44 WR O WRITE signal45 LCDCS O LCD chip enable output
46 CNTDAT OCommon data output(EEPROM,LCD,SHIFT REG,1bit D/A MODEM)
47 CNTCLK OCommon clock output(EEPROM,LCD,SHIFT REG,1bit D/A MODEM)
Pin Port I/O FunctionNo. NamePin Port I/O FunctionNo. Name
PinPort I/O FunctionNo.
Shift register 2:BU4094BCFV(IC6) Pin function
48 CSO - Chip select signal49 A19 - Not used
50-59 A18-A9 - Flash memory address bus60 ACC - +5V61 A8 - Flash memory address bus62 VSS - GND
63-70 A7-A0 - Flash memory address bus71-75 KIN0-KIN4 I Key scan input
76 PLLUL O PLL unlock detect input unlock: L77 PLLSTB O PLL strobe output Latch: L78 SAVE I Battery save output
79-86 D7-D0 - Flash memory data bus87 KEYAD I MONI LAMP key input88 BATT I Battery voltage input89 RFDAT O PLL data output90 RFCLK O PLL clock output91 NC - NC92 RSSQL I Receive signal strength indicator input93 ANLSQL I Analog squelch level input94 AVSS - GND95 TOI I QT/DQT signal input96 VREF - Reference voltage input97 AVCC - GND98 DTMPD O DTME IC power control Power down: H99 DTMCLK O DTME IC decode clock output100 DTMDAT I DTME IC decode data input
4 5MC O 5MC control Power on: L5 5RC O 5R control Power on: L6 5TC O 5T control Power on: H7 SPMUTE O AF amp power supply control Power on: H11 AUX6 O Option board port 612 AUX5 O Option board port 513 LCDBLK O LCD back light Back light on: L14 RX O RX/TX VCO SW RX: L
4 W/N O Wide/Narrow SW (K, M) Narrow: L
5 MUTE O RX audio/MIC mute Mute: L6 NC O NC7 LED0 O RED LED LED lights: H11 BSHIFT O Beat Shift Shift on: H12 REG2 O Base Band IC inter register select 213 REG1 O Base Band IC inter register select 114 LED1 O GREEN LED LED lights: H
PinPort I/O FunctionNo.
Shift register 1:BU4094BCFV(IC5) Pin function
TK-272G
22
IC1 IC RF Power Module
IC2 IC PLL system
IC3 IC Comparator (APC)
IC4 IC FM IF system
IC5,6 IC Shift register / Output expander
IC7 IC Voltage regulator / 5V
IC8 IC Voltage detector / Reset
IC9 IC Voltage detector / INT
IC10 IC EEPROM
IC11 IC AF Power amplifier
IC12 IC Flash memory
IC13 IC Microprocessor
IC14 IC Audio processor
IC15(1/2) IC 2Tone amplifier
IC15(2/2) IC AF Pre amplifier
IC16(1/2) IC Bias buffer
IC16(2/2) IC AF Buffer amplifier
IC17 IC D/A converter (TX AF adjustment)
IC18 IC DTMF decoder
IC19 IC Active filter / For LSD in
IC301 IC VCO 1/2 divider
Q1 Transistor PLL IC fin amplifier
Q2 Transistor VCO oscillation (TX)
Q3 Transistor RF Buffer amplifier
Q4 Transistor RF amplifier
Q6 Transistor RF amplifier / TX driver
Q7 FET DC switch
Q8,Q9 Transistor DC switch
Q10 FET VCO oscillation (RX)
Q11 Transistor Ripple filter
Q12 Transistor Tripler
Q13 Transistor DC switch
Q14 Transistor 2nd IF W/N switch sets to on when Narrow
Q15 Transistor DC switch
Q16 Transistor DC switch / 5R
Q17 Transistor 2nd IF W/N switch sets to on when Wide
Q18 Transistor DC switch / 5T, Save
Q19 FET Mixer
Q20,Q21 Transistor DC switch / 5T, Save
Q22 Transistor IF amplifier
DISPLAY UNIT (X54-3250-10)
Q23 Transistor DC switch / W/N audio amplitude adjust
Q24 Transistor DC switch / LED (Red)
Q25 Transistor DC Switch / LED (Green)
Q26 Transistor DC switch / Squelch
Q27 FET DC switch / 5T, Save
Q28 Transistor DC switch / 5M
Q30 FET SP Mute switch
Q31 Transistor Clock frequency shift
Q32~34 Transistor DC switch / SP Mute
Q35(1/2) FET Mute switch / MIC line mute
Q35(2/2) FET DC switch
Q36 FET Mute switch
Q301 FET RF amplifier
D1 Diode Unlock detect
D2Variable
Frequency controlcapacitance diode
D3 Diode ANT switch
D4Variable
Frequency controlcapacitance diode
D5 Diode TX/RX switch
D6Variable
TX modulationcapacitance diode
D7 Diode ANT switch
D8 Zener Diode Overload protection
D9Variable
Frequency controlcapacitance diode
D10 Diode ANT switch
D11Variable
Frequency controlcapacitance diode
D12 Diode Current steering
D13,14 Diode RF switch (2nd IF wide/narrow)
D15 Diode Reverse protection
D17 Diode Model check
D18 LED LED/ Red, Green
D19 Diode Model check
D21 Diode Voltage drop
D22 Diode Reverse protection
D23 Diode Voltage clamp
D302,303,305Variable
Rf BPF turnigcapacitance diode
IC501 IC LCD driver
Q501 Transistor Current driver / LCD back light LED AVR
Q502 Transistor DC switch
D505 Diode Speed up
D506 LED LCD back light
D507 Diode Voltage reference
D508~510 LED LED /Key pad back light
D511 LED LCD back light
D512~516 LED LED /Key pad back light
Ref. No. Use/Function Operation/Condition
Ref. No. Use/Function Operation/Condition
TX-RX UNIT (X57-587X-XX)
Ref. No. Use/Function Operation/Condition
DESCRIPTION OF COMPONENTS
TK-272GPARTS LIST
23
Parts No. DescriptionAddress NewpartsDestination DestinationRef. No. Parts No. DescriptionAddress New
parts Ref. No.
TK-272G
∗ New Parts. indicates safety critical components.Parts without Parts No. are not supplied.Les articles non mentionnes dans le Parts No. ne sont pas fournis.Teile ohne Parts No. werden nicht geliefert.TK-272G
L: Scandinavia K: USA P: CanadaY: PX (Far East, Hawaii) T: England E: EuropeY: AAFES (Europe) X: Australia M: Other Areas
K : TK-272G KK2 : TK-272G K2
!
A 3B N09-2319-05 BINDING HEAD SCREWB 2A N09-2331-05 SPECIAL SCREWC 1B N14-0582-14 CIRCULAR NUTD 1B N14-0583-04 CIRCULAR NUTE 3A N30-2606-46 PAN HEAD MACHINE SCREW
F 2A N39-2030-46 PAN HEAD MACHINE SCREWG 2B N67-2005-46 PAN HEAD SEMS SCREW WH 1B,3A,3B N78-2045-46 PAN HEAD TAPTITE SCREWI 3A N79-2030-46 PAN HEAD TAPTITE SCREWJ 2A,2B N83-2005-46 PAN HEAD TAPTITE SCREW
K 2C N99-2012-05 SCREW SET
VR2 - R31-0628-15 VARIABLE RESISTOR
SP 1B T07-0326-05 SPEAKER
S1 - W02-1969-15 ENCODER50 2D W09-0940-15 BATTERY ASSY
D506 B30-2210-05 LED(TLY)D508-510 B30-2171-05 LED(D)D511 B30-2210-05 LED(TLY)D512-516 B30-2171-05 LED(D)
C501-509 CC73GCH1H221J CHIP C 220PF JC513 CK73GB1H102K CHIP C 1000PF KC515,516 CC73GCH1H101J CHIP C 100PF J
CN501 E40-6012-05 FLAT CABLE CONNECTOR
L501,502 L92-0138-05 FERRITE CHIP
CP501 R90-0748-05 MULTI-COMP 47K X4CP502,503 R90-0724-05 MULTI-COMP 1K X4R501-510 RK73GB1J102J CHIP R 1.0K J 1/16WR511 R92-1252-05 CHIP R 0 OHMR512 RK73GB1J102J CHIP R 1.0K J 1/16W
R513-515 RK73GB1J103J CHIP R 10K J 1/16WR516 RK73GB1J473J CHIP R 47K J 1/16WR517 RK73GB1J103J CHIP R 10K J 1/16WR518 RK73GB1J471J CHIP R 470 J 1/16WR519-522 RK73GB1J102J CHIP R 1.0K J 1/16W
R523 RK73GB1J473J CHIP R 47K J 1/16WR524 RK73GB1J471J CHIP R 470 J 1/16W
D501-504 MA2S111 DIODED505 1SS373 DIODED507 MA2S111 DIODEIC501 LC75823W MOS ICQ501 2SB1132(Q,R) TRANSISTOR
Q502 2SC4617(S) TRANSISTOR
X57-5870-11 TX-RX UNITD18 B30-2019-05 LED(RED/GRE)
C1 CK73GB1H471K CHIP C 470PF K
1 1A ∗ A02-3568-23 CABINET ASSY2 3B A82-0036-02 REAR PANEL
3 2C B09-0351-03 CAP (SP/MIC)4 2B B11-1220-03 ILLUMINATION GUIDE5 2B B38-0820-05 LCD6 1D B46-0470-00 WARRANTY CARD7 1D ∗ B62-1388-00 INSTRUCTION MANUAL
8 3B E04-0413-05 RF COAXIAL RECEPTACLE(SMA)9 3A E23-1183-04 RELAY TERMINAL (BATT-)10 2A E23-1184-14 RELAY TERMINAL (BATT+)11 2B E29-1177-04 INTER CONNECTOR(LCD)12 2A E37-0805-05 FLAT CABLE (TX/RX-DISP)
13 1B E37-0829-05 PROCESSED LEAD WIRE (SP)14 3A E37-0830-05 FLAT CABLE (PTT)
15 2B F10-2302-04 SHIELDING COVER(POWER MODULE)16 2A F10-2304-03 SHIELDING COVER(TX/RX UNIT)17 2A F20-3307-04 INSULATING SHEET(TX/RX UNIT)18 2A F20-3308-04 INSULATING SHEET(TX/RX UNIT)
19 1A G01-0881-04 COIL SPRING (BATT RELEASE)20 1B G10-1232-04 FIBROUS SHEET(SPEAKER)21 3B G13-1744-14 CUSHION (CHASSIS-BATT)- - G13-1834-04 CUSHION(TERMINAL+ -)24 1B G53-0882-03 PACKING (SPEAKER/ECM)
25 2A G53-0883-04 PACKING (BATT TERMINAL)26 1A G53-0891-04 PACKING (PTT KNOB)27 3A ∗ G53-1530-02 PACKING (SIDE)28 2B ∗ G53-1531-03 PACKING (SP/MIC)
29 1C,2C H12-1487-02 PACKING FIXTURE30 3C ∗ H12-3093-02 PACKING FIXTURE31 3D ∗ H12-3094-03 PACKING FIXTURE32 2D ∗ H21-0769-04 PROTECTION COVER33 1C H25-0085-04 PROTECTION BAG (100/200/0.07)
34 2C H25-2012-04 PROTECTION BAG (75/100/0.08)35 3C ∗ H52-1697-02 ITEM CARTON CASE
36 1A J19-1572-04 HOLDER (BATT RELEASE)37 2B J19-5352-03 HOLDER (VOL/ENC)38 2A J19-5353-14 HOLDER (BATT TERMINAL)39 2C J21-4493-04 SP/MIC HOLDER40 2B J21-8377-03 LCD HOLDER
41 1B J21-8378-04 SPEAKER FIXTURE42 1C J29-0658-05 BELT HOOK43 2A J32-0925-04 HEXAGON BOSS
44 1B K29-5331-03 KNOB (ENCODER)45 1B K29-5332-03 KNOB (VOLUME)46 1A K29-5333-13 BUTTON KNOB (MONI/LAMP)47 1A K29-5334-13 BUTTON KNOB (PTT)48 1A K29-5337-03 LEVER KNOB (BATT RELEASE)
49 1A ∗ K29-9043-02 KEY TOP
DISPLAY UNIT (X54-3250-10)
TX-RX UNIT (X57-5870-XX)-11:TK-272G K -13:TK-272G K2
TK-272GPARTS LIST
24
Ref. No. Parts No. DescriptionAddress NewpartsRef. No. Parts No. DescriptionAddress New
parts Destination Destination
TX-RX UNIT (X57-5870-XX)
K : TK-272G KK2 : TK-272G K2
C3,4 CC73GCH1H070B CHIP C 7.0PF B KC3,4 CC73GCH1H090B CHIP C 9.0PF B K2C5 CC73GCH1H100C CHIP C 10PF C KC5 CC73GCH1H120G CHIP C 12PF G K2C6 CK73GB1C104K CHIP C 0.10UF K
C8 CC73GCH1H030B CHIP C 3.0PF BC9 CK73GB1H102K CHIP C 1000PF K K2C9,10 CK73GB1H102K CHIP C 1000PF K KC10 CC73GCH1H101J CHIP C 100PF J K2C11 CC73GCH1H820J CHIP C 82PF J K2
C11,12 CC73GCH1H180J CHIP C 18PF J KC12 CC73GCH1H220G CHIP C 22PF G K2C13 CK73GB1H102K CHIP C 1000PF KC14 CC73GCH1H010B CHIP C 1.0PF BC16 CC73GCH1H150G CHIP C 15PF G
C17 CC73GCH1H040B CHIP C 4.0PF B K2C17 CC73GCH1H060B CHIP C 6.0PF B KC18 CC73GCH1H330G CHIP C 33PF G KC18 CK73GB1H471K CHIP C 470PF K K2C20 CC73GCH1H110J CHIP C 11PF J K2
C21 CC73GCH1H100C CHIP C 10PF C K2C22 CC73GCH1H101J CHIP C 100PF JC23 CC73GCH1H100C CHIP C 10PF C K2C23 CC73GCH1H220G CHIP C 22PF G KC24 CC73GCH1H160G CHIP C 16PF G K
C24 CC73GCH1H240G CHIP C 24PF G K2C25 CC73GCH1H130G CHIP C 13PF G KC25 CC73GCH1H180G CHIP C 18PF G K2C26 CC73GCH1H040B CHIP C 4.0PF B K2C27 CC73GCH1H0R5B CHIP C 0.5PF B
C28 CC73GCH1H040C CHIP C 4.0PF CC30 CC73GCH1H100D CHIP C 10PF DC31 C92-0507-05 CHIP-TAN 4.7UF 6.3WVC32 CK73GB1C104K CHIP C 0.10UF KC33 CC73GCH1H050B CHIP C 5.0PF B K
C33 CC73GCH1H150G CHIP C 15PF G K2C35-37 CK73GB1H102K CHIP C 1000PF KC40,41 CK73GB1H102K CHIP C 1000PF KC42-44 CC73GCH1H101J CHIP C 100PF JC45 CK73GB1H471K CHIP C 470PF K
C48,49 C92-0001-05 CHIP-C 0.1UF 35WVC51 C92-0514-05 CHIP-TAN 2.2UF 10WVC52 CC73GCH1H050B CHIP C 5.0PF B K2C52 CC73GCH1H390J CHIP C 39PF J KC53 CK73GB1H102K CHIP C 1000PF K
C54 CK73FB1C474K CHIP C 0.47UF KC55 CK73GB1H102K CHIP C 1000PF KC57 CK73FB1C474K CHIP C 0.47UF KC58 CK73GB1H103K CHIP C 0.010UF KC60 CK73GB1H103K CHIP C 0.010UF K
C62 CC73GCH1H150G CHIP C 15PF G K2C62 CC73GCH1H221J CHIP C 220PF J KC63 CC73GCH1H050B CHIP C 5.0PF BC64 CC73GCH1H010B CHIP C 1.0PF BC68 C92-0565-05 CHIP-TAN 6.8UF 10WV
C70 CK73GB1H103K CHIP C 0.010UF K
C71 CC73GCH1H101J CHIP C 100PF JC72 CC73GCH1H060B CHIP C 6.0PF B KC72 CC73GCH1H200J CHIP C 20PF J K2C73 CK73GB1H102K CHIP C 1000PF KC74 CK73FB1E104K CHIP C 0.10UF K
C75,76 CK73GB1H102K CHIP C 1000PF KC78 CC73GCH1H470J CHIP C 47PF JC81 CC73GCH1H010C CHIP C 1.0PF CC82 CK73GB1H102K CHIP C 1000PF KC84,85 CK73GB1H102K CHIP C 1000PF K
C86,87 CC73GCH1H100D CHIP C 10PF DC88 CC73GCH1H1R5B CHIP C 1.5PF B KC88 CC73GCH1H3R5B CHIP C 3.5PF B K2C89 CC73GCH1H050B CHIP C 5.0PF BC90 C92-0560-05 CHIP-TAN 10UF 6.3WV
C94 C92-0560-05 CHIP-TAN 10UF 6.3WVC95,96 CK73GB1H102K CHIP C 1000PF KC98 C92-0560-05 CHIP-TAN 10UF 6.3WVC99 CK73GB1C104K CHIP C 0.10UF KC100 C92-0507-05 CHIP-TAN 4.7UF 6.3WV
C101 CK73GB1H102K CHIP C 1000PF KC104 CK73GB1H102K CHIP C 1000PF KC107,108 CK73GB1C104K CHIP C 0.10UF KC109 C92-0560-05 CHIP-TAN 10UF 6.3WVC110 CK73GB1H103K CHIP C 0.010UF K
C111 CK73GB1H102K CHIP C 1000PF KC112 CC73GCH1H020B CHIP C 2.0PF BC113 CK73GB1H471K CHIP C 470PF KC114 CK73GB1H331K CHIP C 330PF K K2C114 CK73GB1H391K CHIP C 390PF K K
C115 CK73GB1C104K CHIP C 0.10UF KC118 CK73GB1H102K CHIP C 1000PF KC119 CK73FB1A105K CHIP C 1.0UF KC120,121 CK73GB1H102K CHIP C 1000PF KC122 CK73FB1A105K CHIP C 1.0UF K
C123 CK73GB1H331K CHIP C 330PF K K2C123 CK73GB1H391K CHIP C 390PF K KC124 CC73GCH1H270J CHIP C 27PF JC125,126 CK73GB1H103K CHIP C 0.010UF KC128 CC73GCH1H040C CHIP C 4.0PF C
C129 CC73GCH1H020C CHIP C 2.0PF CC130 CK73GB1H471K CHIP C 470PF KC131 CC73GCH1H100D CHIP C 10PF DC132 CK73GB1H103K CHIP C 0.010UF KC133 CC73GCH1H820J CHIP C 82PF J
C135 CK73GB1H103K CHIP C 0.010UF KC136 CC73GCH1H100D CHIP C 10PF DC137 CK73GB1H102K CHIP C 1000PF KC138 CK73GB1C104K CHIP C 0.10UF KC139 CC73GCH1H181J CHIP C 180PF J
C140 CK73GB1H103K CHIP C 0.010UF KC141 CK73GB1C104K CHIP C 0.10UF KC142 CK73FB1A105K CHIP C 1.0UF KC143,144 CK73GB1H102K CHIP C 1000PF KC146,147 CK73GB1C104K CHIP C 0.10UF K
C148 CK73GB1H103K CHIP C 0.010UF K
TK-272GPARTS LIST
25
Ref. No. Parts No. DescriptionAddress NewpartsRef. No. Parts No. DescriptionAddress New
parts Destination Destination
TX-RX UNIT (X57-5870-XX)
K : TK-272G KK2 : TK-272G K2
C150-153 CK73GB1H102K CHIP C 1000PF KC155 C92-0662-05 CHIP-TAN 15UF 6.3WVC156,157 CK73GB1H102K CHIP C 1000PF KC158 CK73FB1A105K CHIP C 1.0UF KC159 CK73GB1H102K CHIP C 1000PF K
C161 CK73GB1H102K CHIP C 1000PF KC162 CK73GB1H103K CHIP C 0.010UF KC163,164 CK73GB1H102K CHIP C 1000PF KC165 CK73GB1H103K CHIP C 0.010UF KC166 CK73FF1E104Z CHIP C 0.10UF Z
C167 CK73GB1H102K CHIP C 1000PF KC170,171 CK73GB1H471K CHIP C 470PF KC173 C92-0567-05 CHIP-TAN 68UF 6.3WVC174 CK73GB1H102K CHIP C 1000PF KC176 CC73GCH1H101J CHIP C 100PF J
C177 CK73GB1C473K CHIP C 0.047UF KC178 C92-0560-05 CHIP-TAN 10UF 6.3WVC179 CK73GB1C104K CHIP C 0.10UF KC180 CK73GB1H103K CHIP C 0.010UF KC181 CK73GB1C393K CHIP C 0.039UF K
C182 CK73GB1H102K CHIP C 1000PF KC183,184 CK73GB1C104K CHIP C 0.10UF KC185 CC73GCH1H180J CHIP C 18PF JC186,187 CK73GB1C104K CHIP C 0.10UF KC189 CK73GB1H103K CHIP C 0.010UF K
C190,191 CK73GB1C104K CHIP C 0.10UF KC192,193 CC73GCH1H300J CHIP C 30PF JC194 C92-0507-05 CHIP-TAN 4.7UF 6.3WVC196 CC73GCH1H101J CHIP C 100PF JC198,199 CK73GB1H103K CHIP C 0.010UF K
C200 CK73GB1A224K CHIP C 0.22UF KC201 CK73GB1H103K CHIP C 0.010UF KC202,203 CK73GB1C104K CHIP C 0.10UF KC204 CK73FB1C474K CHIP C 0.47UF KC205 CK73GB1H103K CHIP C 0.010UF K
C206-208 CK73GB1C104K CHIP C 0.10UF KC209 CK73GB1H332K CHIP C 3300PF KC210 CK73GB1H102K CHIP C 1000PF KC211 C92-0507-05 CHIP-TAN 4.7UF 6.3WVC212 CK73GB1H122K CHIP C 1200PF K
C213 CK73GB1H103K CHIP C 0.010UF KC215 CK73GB1C104K CHIP C 0.10UF KC216 CK73GB1H332K CHIP C 3300PF KC217 CK73GB1E153K CHIP C 0.015UF KC218 CK73FB1H563K CHIP C 0.056UF K
C219,220 CK73GB1C104K CHIP C 0.10UF KC221 CK73GB1H471K CHIP C 470PF KC222 CK73GB1H103K CHIP C 0.010UF KC223 C92-0560-05 CHIP-TAN 10UF 6.3WVC224 CK73GB1H122K CHIP C 1200PF K
C225 CC73GCH1H101J CHIP C 100PF JC226,227 CK73GB1H562J CHIP C 5600PF JC229 CK73FB1H102K CHIP C 1000PF KC230 CK73GB1H562J CHIP C 5600PF JC231 C92-0521-05 CHIP-TAN 0.47UF 20WV
C232 CK73GB1H471K CHIP C 470PF K
C233 CC73GCH1H151J CHIP C 150PF JC234,235 CK73GB1H272J CHIP C 2700PF JC236 CK73GB1C104K CHIP C 0.10UF KC238 CK73GB1H392K CHIP C 3900PF KC239 CK73GB1C104K CHIP C 0.10UF K
C240 CK73GB1H272J CHIP C 2700PF JC241 CK73GB1H102K CHIP C 1000PF KC242 C92-0560-05 CHIP-TAN 10UF 6.3WVC243 CK73FB1A105K CHIP C 1.0UF KC244 C92-0560-05 CHIP-TAN 10UF 6.3WV
C245 CK73GB1H471K CHIP C 470PF KC246 CK73FB1A105K CHIP C 1.0UF KC247 CK73GB1E123K CHIP C 0.012UF KC248 CK73GB1H103K CHIP C 0.010UF KC249 CK73GB1H222K CHIP C 2200PF K
C250 CK73GB1C683K CHIP C 0.068UF KC251 CK73GB1C104K CHIP C 0.10UF KC252 CK73GB1C473K CHIP C 0.047UF KC253,254 CK73GB1H103K CHIP C 0.010UF KC255 CK73GB1H183K CHIP C 0.018UF K
C257 CK73GB1E153K CHIP C 0.015UF KC258 CK73GB1C333K CHIP C 0.033UF KC259 CC73GCH1H121J CHIP C 120PF JC260 CK73GB1H183K CHIP C 0.018UF KC261 CK73GB1E153K CHIP C 0.015UF K
C262 CK73GB1H102K CHIP C 1000PF KC263 CK73GB1C104K CHIP C 0.10UF KC265,266 CK73GB1C104K CHIP C 0.10UF KC268 CK73GB1H102K CHIP C 1000PF KC269 CK73GB1H152K CHIP C 1500PF K
C270 CK73GB1H222K CHIP C 2200PF KC271 CK73GB1H102K CHIP C 1000PF KC301 CK73GB1C104K CHIP C 0.10UF KC303 CK73GB1H102K CHIP C 1000PF KC305 CK73GB1H102K CHIP C 1000PF K
C307 CC73GCH1H100D CHIP C 10PF D KC307 CC73GCH1H150G CHIP C 15PF G K2C308 CK73GB1H102K CHIP C 1000PF KC309 CC73GCH1H030B CHIP C 3.0PF B K2C310 CC73GCH1H150G CHIP C 15PF G K2
C310 CC73GCH1H220G CHIP C 22PF G KC311 CC73GCH1H120G CHIP C 12PF G K2C311 CC73GCH1H180G CHIP C 18PF G KC312 CC73GCH1H220J CHIP C 22PF JC314 CC73GCH1H050B CHIP C 5.0PF B K2
C315 CC73GCH1H010B CHIP C 1.0PF B K2C316 CC73GCH1H220J CHIP C 22PF J K2C316 CC73GCH1H390J CHIP C 39PF J KC317,318 CK73GB1H102K CHIP C 1000PF KC319 CC73GCH1H220J CHIP C 22PF J K2
C319 CC73GCH1H390J CHIP C 39PF J KC320 CK73GB1C104K CHIP C 0.10UF KC323 CK73GB1C104K CHIP C 0.10UF KC324 CC73GCH1H090D CHIP C 9.0PF D KC324 CC73GCH1H220J CHIP C 22PF J K2
C326 CK73GB1H102K CHIP C 1000PF K
TK-272GPARTS LIST
26
Ref. No. Parts No. DescriptionAddress NewpartsRef. No. Parts No. DescriptionAddress New
parts Destination Destination
TX-RX UNIT (X57-5870-XX)
K : TK-272G KK2 : TK-272G K2
TC1,2 C05-0384-05 CERAMIC TRIMMER CAP(10P)
CN1 E40-6012-05 FLAT CABLE CONNECTORCN3 E40-5662-05 PIN ASSY SOCKETCN5 E40-5932-05 PIN ASSY SOCKETJ1 E11-0457-05 PHONE JACK (2.5/3.5D)
F1 F53-0130-05 FUSEF1 F53-0217-05 FUSE
CD1 L79-1474-05 TUNING COILCF1 L72-0968-05 CERAMIC FILTERCF2 L72-0969-05 CERAMIC FILTERL2 L92-0138-05 FERRITE CHIPL3 L40-3391-86 SMALL FIXED INDUCTOR(3.3U)
L4 L33-0745-05 SMALL FIXED INDUCTORL5 L34-4548-05 AIR-CORE COIL KL5 L34-4549-05 AIR-CORE COIL K2L6 L34-4549-05 AIR-CORE COIL KL6 L34-4550-05 AIR-CORE COIL K2
L7 L34-4548-05 AIR-CORE COILL9 L40-5675-92 SMALL FIXED INDUCTOR(56NH) KL9 L40-6875-92 SMALL FIXED INDUCTOR(68NH) K2L10 L40-1095-34 SMALL FIXED INDUCTOR(1UH)L11 L40-1092-81 SMALL FIXED INDUCTOR
L12 L40-3391-86 SMALL FIXED INDUCTOR(3.3U)L14 L40-1085-92 SMALL FIXED INDUCTOR(100NH)L15 L40-5675-92 SMALL FIXED INDUCTOR(56NH)L17 L34-4550-05 AIR-CORE COILL18-20 L92-0138-05 FERRITE CHIP
L21 L40-1875-92 SMALL FIXED INDUCTOR(18NH)L22 L40-1085-92 SMALL FIXED INDUCTOR(100NH)L23 L92-0138-05 FERRITE CHIPL24 L40-5681-86 SMALL FIXED INDUCTOR(0.56U)L25 L40-1085-92 SMALL FIXED INDUCTOR(100NH)
L26 L33-0745-05 SMALL FIXED INDUCTORL27 L92-0149-05 FERRITE CHIPL30 L40-2702-86 SMALL FIXED INDUCTOR(27U)L31 L40-1085-92 SMALL FIXED INDUCTOR(100NH)L32 L40-1005-85 SMALL FIXED INDUCTOR(10U)
L35 L40-1285-92 SMALL FIXED INDUCTOR(120NH) KL35 L40-1585-92 SMALL FIXED INDUCTOR(150NH) K2L36 L40-1085-85 SMALL FIXED INDUCTOR(0.10U)L37 L40-5685-85 SMALL FIXED INDUCTOR(0.56U)L38 L92-0138-05 FERRITE CHIP
L39 L92-0149-05 FERRITE CHIPL40,41 L92-0138-05 FERRITE CHIPL42 L92-0131-05 FERRITE CHIPL43,44 L92-0138-05 FERRITE CHIPL302 L33-0745-05 SMALL FIXED INDUCTOR
L304 L40-8288-76 SMALL FIXED INDUCTOR(0.82UH)L305 L34-4621-05 COILL306 L34-4622-05 COILL307 L34-4446-05 COILL308 L40-4785-85 SMALL FIXED INDUCTOR(0.47U)
X1 L77-1794-05 TCXO (16.8MHZ)X2 L78-0479-05 RESONATOR (3.58MHZ)X3 L77-1810-05 CRYSTAL RESONATOR(9.8304MHZ)
X3 L77-1835-05 CRYSTAL RESONATOR(9.8304MHZ)XF1 L71-0546-05 CRYSTAL FILTER (49.95MHZ)
CP1 R90-0724-05 MULTI-COMP 1K X4CP2-9 R90-0741-05 MULTIPLE RESISTORCP10 R90-0724-05 MULTI-COMP 1K X4CP11-18 R90-0741-05 MULTIPLE RESISTORCP19 R90-0718-05 MULTI-COMP 4.7K X4
CP20 RK75HA1J472J CHIP-COM 4.7K J 1/16WR1 RK73GB1J124J CHIP R 120K J 1/16WR2 RK73GB1J104J CHIP R 100K J 1/16WR3 RK73GB1J682J CHIP R 6.8K J 1/16WR4 RK73GB1J102J CHIP R 1.0K J 1/16W
R5 RK73GB1J152J CHIP R 1.5K J 1/16WR6 R92-1252-05 CHIP R 0 OHMR7 RK73GB1J100J CHIP R 10 J 1/16WR8 RK73GB1J102J CHIP R 1.0K J 1/16WR10 RK73GB1J331J CHIP R 330 J 1/16W
R13 RK73GB1J822J CHIP R 8.2K J 1/16WR14 RK73GB1J561J CHIP R 560 J 1/16WR16 RK73GB1J391J CHIP R 390 J 1/16WR17 RK73GB1J103J CHIP R 10K J 1/16WR18 RK73GB1J124J CHIP R 120K J 1/16W
R19 RK73GB1J332J CHIP R 3.3K J 1/16WR20 RK73GB1J122J CHIP R 1.2K J 1/16WR21 RK73GB1J221J CHIP R 220 J 1/16WR22 RK73GB1J472J CHIP R 4.7K J 1/16WR23 RK73GB1J122J CHIP R 1.2K J 1/16W
R26 RK73GB1J561J CHIP R 560 J 1/16WR27 RK73GB1J270J CHIP R 27 J 1/16WR28,29 RK73GB1J271J CHIP R 270 J 1/16WR30 RK73GB1J182J CHIP R 1.8K J 1/16WR31 RK73GB1J101J CHIP R 100 J 1/16W
R33 RK73GB1J101J CHIP R 100 J 1/16WR34 RK73GB1J473J CHIP R 47K J 1/16WR35 RK73GB1J104J CHIP R 100K J 1/16WR36 RK73GB1J473J CHIP R 47K J 1/16WR37 RK73GB1J472J CHIP R 4.7K J 1/16W
R38 RK73GB1J101J CHIP R 100 J 1/16WR39 RK73GB1J562J CHIP R 5.6K J 1/16WR40 RK73GB1J183J CHIP R 18K J 1/16WR41 RK73GB1J101J CHIP R 100 J 1/16WR42 RK73GB1J220J CHIP R 22 J 1/16W
R43 RK73GB1J101J CHIP R 100 J 1/16WR44 RK73GB1J102J CHIP R 1.0K J 1/16WR45 RK73GB1J331J CHIP R 330 J 1/16WR46 RN73GH1J154D CHIP R 150K D 1/16WR47 RK73GB1J104J CHIP R 100K J 1/16W
R48 RK73GB1J334J CHIP R 330K J 1/16WR49 RK73GB1J103J CHIP R 10K J 1/16WR50 RN73GH1J154D CHIP R 150K D 1/16WR51 RK73GB1J102J CHIP R 1.0K J 1/16WR52 RK73GB1J151J CHIP R 150 J 1/16W
R53 RK73GB1J472J CHIP R 4.7K J 1/16WR54 RN73GH1J154D CHIP R 150K D 1/16WR55 RK73GB1J105J CHIP R 1.0M J 1/16WR56-58 RK73EB2ER39K CHIP R 0.39 K 1/4W
TK-272GPARTS LIST
27
Ref. No. Parts No. DescriptionAddress NewpartsRef. No. Parts No. DescriptionAddress New
parts Destination Destination
TX-RX UNIT (X57-5870-XX)
K : TK-272G KK2 : TK-272G K2
R59 RN73GH1J154D CHIP R 150K D 1/16WR60 R92-1252-05 CHIP R 0 OHMR61 RK73GB1J473J CHIP R 47K J 1/16WR62 RN73GH1J154D CHIP R 150K D 1/16WR64,65 RK73GB1J104J CHIP R 100K J 1/16W
R68 RN73GH1J154D CHIP R 150K D 1/16WR69 RK73GB1J220J CHIP R 22 J 1/16WR70 RK73GB1J104J CHIP R 100K J 1/16WR71 RK73GB1J124J CHIP R 120K J 1/16WR72 RK73GB1J103J CHIP R 10K J 1/16W
R73 RK73GB1J273J CHIP R 27K J 1/16WR74,75 RK73GB1J223J CHIP R 22K J 1/16WR76 R92-0670-05 CHIP R 0 OHMR77 R92-1252-05 CHIP R 0 OHMR78,79 RK73GB1J153J CHIP R 15K J 1/16W
R80,81 RK73GB1J223J CHIP R 22K J 1/16WR82 RK73GB1J102J CHIP R 1.0K J 1/16WR83 RK73GB1J103J CHIP R 10K J 1/16WR84 RK73GB1J474J CHIP R 470K J 1/16WR85 RK73GB1J102J CHIP R 1.0K J 1/16W
R86 RK73GB1J394J CHIP R 390K J 1/16WR87 RK73GB1J221J CHIP R 220 J 1/16WR88 RK73GB1J102J CHIP R 1.0K J 1/16WR89 RK73GB1J821J CHIP R 820 J 1/16WR90,91 RK73GB1J332J CHIP R 3.3K J 1/16W
R92 RK73GB1J100J CHIP R 10 J 1/16WR93 RK73GB1J222J CHIP R 2.2K J 1/16W K2R93 RK73GB1J332J CHIP R 3.3K J 1/16W KR94 RK73GB1J681J CHIP R 680 J 1/16WR95 RK73GB1J222J CHIP R 2.2K J 1/16W K
R95 RK73GB1J471J CHIP R 470 J 1/16W K2R96 RK73GB1J151J CHIP R 150 J 1/16WR97 RK73GB1J183J CHIP R 18K J 1/16WR98 RK73GB1J473J CHIP R 47K J 1/16WR99 RK73GB1J684J CHIP R 680K J 1/16W
R100 RK73GB1J473J CHIP R 47K J 1/16WR101 RK73GB1J104J CHIP R 100K J 1/16WR102,103 RK73GB1J272J CHIP R 2.7K J 1/16WR104 RK73GB1J472J CHIP R 4.7K J 1/16WR105 RK73GB1J222J CHIP R 2.2K J 1/16W
R106 RK73GB1J272J CHIP R 2.7K J 1/16WR107 RK73GB1J470J CHIP R 47 J 1/16WR108 RK73GB1J222J CHIP R 2.2K J 1/16WR109 RK73GB1J102J CHIP R 1.0K J 1/16WR110,111 RK73GB1J103J CHIP R 10K J 1/16W
R112 RK73GB1J102J CHIP R 1.0K J 1/16WR113 RK73GB1J391J CHIP R 390 J 1/16WR114,115 RK73GB1J103J CHIP R 10K J 1/16WR116,117 RK73GB1J153J CHIP R 15K J 1/16WR118 RK73GB1J473J CHIP R 47K J 1/16W
R119 R92-1252-05 CHIP R 0 OHMR120,121 RK73GB1J473J CHIP R 47K J 1/16WR122 RK73GB1J102J CHIP R 1.0K J 1/16WR123 RK73GB1J104J CHIP R 100K J 1/16WR124 RK73GB1J334J CHIP R 330K J 1/16W
R126 RK73GB1J472J CHIP R 4.7K J 1/16W
R127 RK73GB1J333J CHIP R 33K J 1/16WR128 RK73GB1J102J CHIP R 1.0K J 1/16WR129 RK73GB1J224J CHIP R 220K J 1/16WR130 R92-1252-05 CHIP R 0 OHMR131 RK73GB1J101J CHIP R 100 J 1/16W
R132 RK73GB1J104J CHIP R 100K J 1/16WR133 R92-1252-05 CHIP R 0 OHMR135 RK73GB1J100J CHIP R 10 J 1/16WR137 RK73GB1J101J CHIP R 100 J 1/16WR138 RK73GB1J102J CHIP R 1.0K J 1/16W
R139 RK73GB1J151J CHIP R 150 J 1/16WR140 RK73GB1J102J CHIP R 1.0K J 1/16WR142 R92-1252-05 CHIP R 0 OHMR143 RK73GB1J184J CHIP R 180K J 1/16WR144 R92-1252-05 CHIP R 0 OHM
R145 RK73GB1J474J CHIP R 470K J 1/16WR146 RK73GB1J472J CHIP R 4.7K J 1/16WR147 RK73GB1J470J CHIP R 47 J 1/16WR148 RK73GB1J220J CHIP R 22 J 1/16WR149 RK73GB1J104J CHIP R 100K J 1/16W
R150 RK73GB1J102J CHIP R 1.0K J 1/16WR151 RK73GB1J473J CHIP R 47K J 1/16WR152 RK73GB1J823J CHIP R 82K J 1/16WR153 RK73GB1J104J CHIP R 100K J 1/16WR154 RK73GB1J564J CHIP R 560K J 1/16W
R155 RK73GB1J473J CHIP R 47K J 1/16WR156 RN73GH1J683D CHIP R 68K D 1/16WR157 RK73GB1J102J CHIP R 1.0K J 1/16WR158 R92-1252-05 CHIP R 0 OHMR159 RK73GB1J102J CHIP R 1.0K J 1/16W
R160 RK73GB1J222J CHIP R 2.2K J 1/16WR161 RK73GB1J563J CHIP R 56K J 1/16WR162 RN73GH1J333D CHIP R 33K D 1/16WR163 RN73GH1J274D CHIP R 270K D 1/16WR164 RK73GB1J184J CHIP R 180K J 1/16W
R165 RK73GB1J473J CHIP R 47K J 1/16WR166 RK73GB1J103J CHIP R 10K J 1/16WR167 RK73GB1J564J CHIP R 560K J 1/16WR168 RK73GB1J102J CHIP R 1.0K J 1/16WR169 RK73GB1J473J CHIP R 47K J 1/16W
R170 RK73GB1J394J CHIP R 390K J 1/16WR171 RK73GB1J474J CHIP R 470K J 1/16WR172 RK73GB1J473J CHIP R 47K J 1/16WR173 RK73GB1J104J CHIP R 100K J 1/16WR174 R92-1252-05 CHIP R 0 OHM
R175 RK73GB1J103J CHIP R 10K J 1/16WR176 R92-1252-05 CHIP R 0 OHMR177 RK73GB1J473J CHIP R 47K J 1/16WR178,179 RK73GB1J104J CHIP R 100K J 1/16WR180 RK73GB1J222J CHIP R 2.2K J 1/16W
R181 RK73GB1J472J CHIP R 4.7K J 1/16WR182,183 R92-1252-05 CHIP R 0 OHMR184 RK73GB1J333J CHIP R 33K J 1/16W KR184 RK73GB1J393J CHIP R 39K J 1/16W K2R185 RK73GB1J102J CHIP R 1.0K J 1/16W
R186 RK73GB1J155J CHIP R 1.5M J 1/16W
TK-272GPARTS LIST
28
Ref. No. Parts No. DescriptionAddress NewpartsRef. No. Parts No. DescriptionAddress New
parts Destination Destination
TX-RX UNIT (X57-5870-XX)
K : TK-272G KK2 : TK-272G K2
R198 RK73GB1J154J CHIP R 150K J 1/16WR199 RK73GB1J103J CHIP R 10K J 1/16WR200 RK73GB1J101J CHIP R 100 J 1/16WR201 R92-1252-05 CHIP R 0 OHMR202 RK73GB1J474J CHIP R 470K J 1/16W
R203 R92-1252-05 CHIP R 0 OHMR204 RK73GB1J104J CHIP R 100K J 1/16WR205 RK73GB1J182J CHIP R 1.8K J 1/16WR206 RK73GB1J471J CHIP R 470 J 1/16WR207 RK73GB1J101J CHIP R 100 J 1/16W
R208 RN73GH1J682D CHIP R 6.8K D 1/16WR209 RK73GB1J224J CHIP R 220K J 1/16WR210 RK73GB1J474J CHIP R 470K J 1/16WR211 RK73GB1J103J CHIP R 10K J 1/16WR212 RN73GH1J683D CHIP R 68K D 1/16W
R213 RN73GH1J682D CHIP R 6.8K D 1/16WR214 RK73GB1J184J CHIP R 180K J 1/16WR215 RK73GB1J474J CHIP R 470K J 1/16WR218 R92-1252-05 CHIP R 0 OHMR219 RK73GB1J273J CHIP R 27K J 1/16W
R220,221 RK73GB1J184J CHIP R 180K J 1/16WR222 RK73GB1J153J CHIP R 15K J 1/16WR223 RK73GB1J223J CHIP R 22K J 1/16WR224 RK73GB1J103J CHIP R 10K J 1/16WR225 RK73GB1J153J CHIP R 15K J 1/16W
R226 R92-1252-05 CHIP R 0 OHMR230 RK73GB1J223J CHIP R 22K J 1/16WR231 RK73GB1J104J CHIP R 100K J 1/16WR232 RK73GB1J152J CHIP R 1.5K J 1/16WR233 R92-1252-05 CHIP R 0 OHM
R234 RK73GB1J124J CHIP R 120K J 1/16WR235 RK73GB1J334J CHIP R 330K J 1/16WR237 R92-1252-05 CHIP R 0 OHMR239 RK73GB1J153J CHIP R 15K J 1/16WR240 RK73GB1J223J CHIP R 22K J 1/16W
R241 RK73GB1J334J CHIP R 330K J 1/16WR242 R92-1252-05 CHIP R 0 OHMR244 RK73GB1J561J CHIP R 560 J 1/16WR249 R92-1252-05 CHIP R 0 OHMR250 RK73GB1J472J CHIP R 4.7K J 1/16W
R251 RK73GB1J474J CHIP R 470K J 1/16WR252,253 R92-1252-05 CHIP R 0 OHMR254 RK73GB1J184J CHIP R 180K J 1/16WR255 RK73GB1J474J CHIP R 470K J 1/16WR256-258 R92-1252-05 CHIP R 0 OHM
R259 RK73GB1J473J CHIP R 47K J 1/16WR260,261 RK73GB1J224J CHIP R 220K J 1/16WR301 R92-0679-05 CHIP R 0 OHMR302 RK73GB1J121J CHIP R 120 J 1/16W KR302 RK73GB1J221J CHIP R 220 J 1/16W K2
R303 RK73GB1J101J CHIP R 100 J 1/16WR304 RK73GB1J472J CHIP R 4.7K J 1/16WR305 R92-1252-05 CHIP R 0 OHMR306 RK73GB1J222J CHIP R 2.2K J 1/16WR308 R92-0670-05 CHIP R 0 OHM
R311 RK73GB1J221J CHIP R 220 J 1/16W
R312-314 RK73GB1J104J CHIP R 100K J 1/16WR316 RK73GB1J470J CHIP R 47 J 1/16WR318 R92-1252-05 CHIP R 0 OHMR319 RK73GB1J102J CHIP R 1.0K J 1/16WR320 R92-1252-05 CHIP R 0 OHM
VR1 R12-7491-05 TRIMMING POT.(68K)
S401 S70-0457-05 TACT SWITCHS402,403 S70-0424-05 TACT SWITCH
MIC1 T91-0579-05 MIC ELEMENT
D1 MA2S111 DIODED2 MA2SV05 VARIABLE CAPACITANCE DIODED3 HVU131 DIODED4 MA2SV05 VARIABLE CAPACITANCE DIODED5 HSC277 DIODE
D6 MA360 VARIABLE CAPACITANCE DIODED7 HSC277 DIODED8 MA8062 ZENER DIODED9 MA2S304 VARIABLE CAPACITANCE DIODED10 HSC277 DIODE
D11 MA2S304 VARIABLE CAPACITANCE DIODED12 MA2S111 DIODED13,14 DAN235E DIODED15 HSC277 DIODED17 MA2S111 DIODE
D21 1SS373 DIODED22 1SR154-400 DIODED23 RB706F-40 DIODED301 HSC277 DIODE K2D302,303 HVC350B VARIABLE CAPACITANCE DIODE
D305 HVC350B VARIABLE CAPACITANCE DIODEIC1 PF0314-03 IC (RF POWER MODULE) KIC1 PF0313-03 IC (RF POWER MODULE) K2IC2 MB15A02 MOS ICIC3 NJM2904V MOS IC
IC4 TA31136FN MOS ICIC5,6 BU4094BCFV MOS ICIC7 S-81350HG-KD MOS ICIC8 PST9140NR MOS ICIC9 RN5VL45C MOS IC
IC10 AT2408N10SI2.5 ROM ICIC11 TA7368F MOS ICIC12 AT29C020-90TI ROM ICIC13 30622M4102GP MPUIC14 TC35453F MOS IC
IC15 TA75W01FU MOS ICIC16 TC75W51FU MOS ICIC17 X9C103SI ANALOG ICIC18 LC73872M MOS ICIC19 TA75W01FU MOS IC
IC301 UPB1509GV BI-POLAR ICQ1 2SC5108(Y) TRANSISTORQ2 2SC4226(R24) TRANSISTORQ3,4 2SC5108(Y) TRANSISTORQ6 2SC4988 TRANSISTOR
TK-272GPARTS LIST
29
Ref. No. Parts No. DescriptionAddress NewpartsRef. No. Parts No. DescriptionAddress New
parts Destination Destination
TX-RX UNIT (X57-5870-XX)
K : TK-272G KK2 : TK-272G K2
Q7 2SJ243 FETQ8 UMC4 TRANSISTORQ9 DTC144EE DIGITAL TRANSISTORQ10 2SK508NV(K52) FETQ11 2SC4617(S) TRANSISTOR
Q12 2SC4649(N,P) TRANSISTORQ13,14 DTA144EE DIGITAL TRANSISTORQ15 DTC114EE DIGITAL TRANSISTORQ16 DTA114YE DIGITAL TRANSISTORQ17 DTC144EE DIGITAL TRANSISTOR
Q18 FP210 TRANSISTORQ19 3SK166A FETQ20,21 UMG3N TRANSISTORQ22 2SC4619 TRANSISTORQ23 UMC4 TRANSISTOR
Q24,25 DTC114EE DIGITAL TRANSISTORQ26 DTA114EE DIGITAL TRANSISTORQ27 UPA572T FETQ28 DTA114YE DIGITAL TRANSISTORQ30 2SK1588 FET
Q31 2SC4619 TRANSISTORQ32 2SA1362(GR) TRANSISTORQ33,34 DTC144EE DIGITAL TRANSISTORQ35 UPA672T FETQ36 2SK1824 FET
Q301 2SK1215(E) FET
TK-272G
30
A B
1
2
3
EXPLODED VIEW
Parts with the exploded numbers larger than 700 are not supplied.
2.5
4
4 M2
M3
J32-0925-04
H
47
701
1
26
C 44
45
2024
SP
13
A M3.6x4 :N09-2319-05B M2x3.5 :N09-2331-05C NUT :N14-0582-14D NUT :N14-0583-04E M2.6x6 :N30-2606-46F M2x3 :N39-2030-46G M2x5 :N67-2005-46H f2x4.5 :N78-2045-46 I f2x3 :N79-2030-46J f2x5 :N82-2005-46
41
H
D
40
5
411
2
37
Jx8
IC1
G
F
F
1517
18
DISPLAY unit
49
1643
12
B
3810
TX-RX unit (A/2)
27
28
A
25B
8
702
21
H
TX-RX unit (B/2)14
E
I
704
703
9
46 36
19
48
TK-272G
31
C D
1
2
3
PACKING
29.PACKING FIXTURE
(H12-1487-02)
3. CAP (SP/MIC)
(B09-0351-03)
34.PROTECTION BAG
(H25-2012-04)
42.BELT HOOK
(J29-0658-05)
6. WARRANTY CARD
(B46-0470-00)
33.PROTECTION BAG
(H25-0085-04)
39.SP/MIC HOLDER
(J21-4493-04)K. SCREW SET
(N99-2012-05)
29.PACKING FIXTURE
(H12-1487-02)
30.PACKING FIXTURE
(H12-3093-02)
35.ITEM CARTON CASE
(H52-1697-02)
32.PROTECTION COVER
(H21-0769-04)
7. INSTRUCTION MANUAL
(B62-1388-00)
50.BATTERY ASSY
(W09-0940-15)
31.PACKING FIXTURE
(H12-3094-03)
TK-272G
32
ADJUSTMENT
Test Equipment Required for AlignmentTest Equipment Major Specifications
1. Standard Signal Generator Frequency Range 150 to 174MHz (K) 136 to 150MHz (K2).(SSG) Modulation Frequency modulation and external modulation.
Output -127dBm/0.1µV to greater than -47dBm/1mV2. Power Meter Input Impedance 50Ω.
Operation Frequency 150 to 174MHz (K) 136 to 150MHz (K2).Measurement Range Vicinity of 10W
3. Deviation Meter Frequency Range 150 to 174MHz (K) 136 to 150MHz (K2).4. Digital Volt Meter Measuring Range 10mV to 10V DC
(DVM) Input Impedance High input impedance for minimum circuit loading.5. Oscilloscope DC through 30MHz.6. High Sensitivity Frequency Range 10Hz to 1000MHz.
Frequency Counter Frequency Stability 0.2ppm or less.7. Ammeter 5A.8. AF Volt Meter Frequency Range 50Hz to 10kHz.
(AF VTVM) Voltage Range 1mV to 10V.9. Audio Generator (AG) Frequency Range 50Hz to 5kHz or more.
Output 0 to 1V.10. Distortion Meter Capability 3% or less at 1kHz.
Input Level 50mV to 10Vrms.11. Spectrum Analyzer Measuring Range DC to 1GHz or more12. Tracking Generator Center frequency 50kHz to 600MHz
Output Voltage 100mV or more13. 8Ω Dummy Load Approx. 8Ω, 3W.14. Regulated Power Supply 5V to 10V, approx. 3A
Useful if ammeter equipped.
TK-272G
33
The following parts are required for adjustment
1. Antenna connector adapterThe antenna connector of this radio uses an SMA terminal.Use an antenna connector adapter [SMA(f) – BNC(f) or
SMA(f) – N(f)] for adjustment. (The adapter is not provided asan option, so buy a commercially-available one.)
NoteWhen the antenna connector adapter touches the knob,
draw out the knob to mount the connector.
Repair Jig (Chassis)1. Jig (chassis : Part No. A10-4009-13) for adjustment.2. Use the jig as follows.
① Place the TX-RX unit on the jig and fix it with thirteenscrews z.
➁ Solder the antenna terminal of the TX-RX unit.3. Supply power from an external power supply.
Relay terminal : + (7.5)Jig (Chassis) : -
Relay terminal(+)
Power module
UNIT
JIG
Coaxial antenna connector
zz
zz
z
zz
z
z
Test Mode Test mode operating features
This transceiver has a test mode. To enter test mode,press the [ 2] key and turn the power on. Hold the [ 2] keyuntil the test channel No. and test signalling No. appearon LCD. Test mode can be inhibited by programming. To exittest mode, switch the power on again. The following functionsare available in test mode.
• Controls[PTT] Used when making a transmission.[Side2] Monitor ON and OFF.[Side1] Changes wide and narrow.[°] Sets to the Tuning mode.[•] Unused[2] RF power HIGH and LOW.[3] Changes signalling.[ENCODER] Changes channel.
• LCD indicator“LO” Lights at RF Power Low.“ ” Lights at monitor ON.
• LED indicatorRed LED Lights during transmission. Blinks during low
battery voltage warning.Green LED Lights when there is a carrier.
Repair Jig (Extention Flat cable : part No.
E37-0851-05)This cable is used for connecting the TK-272G display unitand TX/RX unit when you test or repair the transceiver.
Caution : You must connect TK-272G display unit when youtest or repair the transceiver.
Extention Flat cableDisplay unit
TX/RX unit
ADJUSTMENT
TK-272G
34
H.P.O.W. . 1.
150-174(MHz)TEST Ch RX frequency (MHz) TX frequency (MHz)
Low 150.05000 150.00000Low’ 156.05000 156.00000
Center 162.05000 162.00000High’ 168.05000 168.00000High 173.95000 174.00000
Press [°], to enter tuning mode. Use the [2 ] key to writetuning data through the tuning modes, and the channel selectorknob to adjust the tuning requirements (1 to 256 appears onLCD).
Use the [3] key to select the adjustment item through thetuning modes. Use the [] key to adjust 3 or 5 point tuning,and use the [Side1] key to switch between Wide/Narrow.
Panel Tuning Mode K type
LCD display (Tuning mode)
Adjustment item Adjustment (1~256)Point tuning indicator
Wide/Narrow indicator
• Preparations for tuning the transceiverBefore attempting to tune the transceiver, connect the unit
to a suitable power supply.Whenever the transmitter is tuned, the unit must be
connected to a suitable dummy load (i.e. power meter).The speaker output connector must be terminated with a
8Ω dummy load and connected to an AC voltmeter and anaudio distortion meter or a SINAD measurement meter at alltimes during tuning.
ADJUSTMENT
Frequency and signallingThe set has been adjusted for the frequencies shown in the
following table. When required. re-adjust them following theadjustment procedure to obtain the frequencies you want inactual operation.
Frequency (MHz) K type
Channel No. RX Frequency TX Frequency1 162. 05000 162. 000002 150. 05000 150. 000003 173. 95000 174. 000004 162. 00000 162. 000005 162. 20000 162. 200006 162. 40000 162. 40000
7~16
Signalling
Signalling No. RX TX1 None None2 None 100Hz square wave3 QT 67.0Hz QT 67.0Hz4 QT 151.4Hz QT 151.4Hz5 QT 210.7Hz QT 210.7Hz6 QT 250.3Hz QT 250.3Hz7 DQT D023N DQT D023N8 DQT D754I DQT D754I9 DTMF DEC, (159D) DTMF ENC, (159D)10 None DTMF tone 911 2 tone 321.7/928.1Hz ENC12 Single tone 1200Hz Single tone 1200Hz
Frequency (MHz) K2 type
Channel No. RX Frequency TX Frequency1 143. 05000 143. 000002 136. 05000 136. 000003 149. 95000 150. 000004 143. 00000 143. 000005 143. 20000 143. 200006 143. 40000 143. 40000
7~16
136-150(MHz)TEST Ch RX frequency (MHz) TX frequency (MHz)
Low 136.05000 136.00000Low’ 139.55000 139.50000
Center 143.05000 143.00000High’ 146.55000 146.50000High 149.95000 150.00000
Panel Tuning Mode K2 type
LCD display (Test mode)
1 1channel No. Signalling No.
• Transceiver tuning(To place the transceiver in tuning mode)Channel appears on the LCD. Set the channel according to
the tuning requirements.
OFF : Wide
ON : Narrow
TK-272G
35
ADJUSTMENT
Tuning mode
M A X .Max deviation (Narrow)
F Q T .QT fine deviation(Narrow)
F D Q T .DQT Fine deviation(Narrow)
D T M F .DTMF Fine deviation(Narrow)
T O N E .Sigunal tone fine deviation(Narrow)
[Side1]
[Side1]
[Side1]
[Side1]
[Side1]
M A XMax deviation (Wide)
F Q TQT fine deviation(Wide)
F D Q TDQT Fine deviation(Wide)
D T M FDTMF Fine deviation(Wide)
T O N ESigunal tone fine deviation(Wide)
H P O WHi Power
L P O WLow Power
H.POWHi Power (Low)
H.P.OWHi Power (Low’ )
H.P.O.WHi Power (Cen)
H.P.O.W.Hi Power (Hi’)
H.P.O.W. .Hi Power (Hi)
B A T TBattery warning level(Wide)
S E N SSensitivity
L.POWLow Power (Low)
L.P.OWLow Power (Low’)
L.P.O.WLow Power (Cen)
L.P.O.W.Low Power (Hi’)
L.P.O.W. .Low Power (Hi)
.M A XMax deviation (W, L)
.M.A.XMax deviation (W, C)
.M.A.X. .Max deviation (W, H)
.F Q TQT fine deviation(W,L)
.F.Q.TQT fine deviation(W,C)
.F.Q.T. .QT fine deviation(W,H)
F.D Q TDQT Fine deviation(W,L)
F.D.Q.TDQT Fine deviation(W,C)
F.D.Q.T. .DQT Fine deviation(W,H)
S.E N SSensitivity (Low)
S.E.N.SSensitivity (Cen)
S.E.N.S. .Sensitivity (Hi)
Wide
V Q T .Narrow
Narrow
QT VCO balance(Narrow)
X Q T .QT TCXO balance(Narrow)
[Side1]
[Side1]
V Q TQT VCO balance(Wide)
X Q TQT TCXO balance(Wide)
.V Q TQT VCO balance(W,L)
.V.Q.T QT VCO balance(W,C)
.V.Q.T. .QT VCO balance(W,H)
.X Q TQT TCXO balance(W,L)
.X.Q.TQT TCXO balance(W,C)
.X.Q.T. .QT TCXO balance(W,H)
V D Q T .DQT VCO balance(Narrow) [Side1] V D Q T
DQT VCO balance(Wide)V.D Q T
DQT VCO balance(W,L)V.D.Q.T
DQT VCO balance(W,C)V.D.Q.T. .
DQT VCO balance(W,H)
X D Q T .QT TCXO balance(Narrow) [Side1] X D Q T
QT TCXO balance(Wide)X.D Q T
QT TCXO balance(W,L)X.D.Q.T
QT TCXO balance(W,C)X.D.Q.T. .
QT TCXO balance(W,H)
Wide
S Q L 3 .
Narrow
Squelch open(Narrow)
R S S I .RSSI (Narrow)
[Side1] S Q L 3Squelch open(Wide)
R S S IRSSI (Wide)
S Q L 9 .Squelch tight(Narrow) [Side1] S Q L 9
Squelch tight(Wide)
Wide
[ ]
[ ]
[ ]
[ ] [ ]
[ ] [ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ][ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ][ ]
[ ]
[ ]
[ ]
[ ][ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ][ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ][ ]
[ ][ ]
[ ][ ]
[ ][ ]
[ ][ ]
[ ][ ]
[ ]
[ ]
[ ]
[ ]
[ ]
[ ][ ]
TK-272G
36
ADJUSTMENT
NotePrecision parts are used for the PTT, side1, and side2 switches.In order to avoid damaging these switches, do not press them using your fingers. However, if it is necessary to press these
switches, be sure to press them at 90˚ angles, pressing them at other angles can easily damage the parts.
Common Section
Item ConditionMeasurement Adjustment Specifications/
Test equipment Terminal Parts Method Remark
1. Setting 1) BATT terminal voltage:7.5V
2) SSG Standard modulation
[Wide] MOD:1kHz, DEV:3kHz
[Semi Wide] MOD:1kHz, DEV:24kHz
[Narrow] MOD:1kHz, DEV:1.5kHz
2. VCO lock [Panel Test Mode]
voltage 1) CH-Sig:2-1 Power meter ANT Check 0.8V or more
RX 2) CH-Sig:3-1 DVM CV(LV) 4.0V ± 0.1V
TX 3) CH-Sig:2-1 0.8V or more (K)
PTT:ON 0.6V or more (K2)
4) CH-Sig:3-1 3.5V ± 0.1V (K,K2)
PTT:ON
Transmitter Section
Item ConditionMeasurement Adjustment Specifications/
Test equipment Terminal Parts Method Remark
1. Frequency 1) PTT:ON Freq. Counter ANT VR1 Center frequency
Adjust Power meter (162.0 MHz) ± 100Hz (K)
Am meter (143.0 MHz) ± 100Hz (K2)
2. Max Power 1) Adj item [HPOW] Check 5.2W or more
Check Adjust [256]
2) Adj item
[H.P O W] [H.P.O W] [H.P.O.W] [H.P.O.W.] [H.P.O.W. .]Adjust [256]
PTT:ON
3. Hight Power 1) Adj item [HPOW] Encoder 5.0W ±0.1W
Adjust Adjust [∗∗∗] knob 2.2A or less
2) Adj item
[H.P O W] [H.P.O W] [H.P.O.W] [H.P.O.W.] [H.P.O.W. .]Adjust [∗∗∗]
PTT:ON
4. Hight Power [Panel Test Mode]
Check 1) CH-Sig:1-1 Check 4.0~6.0W
PTT:ON 2.3A or less
2) CH-Sig:2-1
PTT:ON
3) CH-Sig:3-1
PTT:ON
5. Low Power 1) Adj item [LPOW] Encoder 1.0W ±0.1W
Adjust Adjust [∗∗∗] knob 1.0A or less
2) Adj item
[L.P O W] [L.P.O W] [L.P.O.W] [L.P.O.W.] [L.P.O.W. .]Adjust [∗∗∗]
PTT:ON
TK-272G
37
ADJUSTMENT
Item ConditionMeasurement Adjustment Specifications/
Test equipment Terminal Parts Method Remark
6. Low Power [Panel Test Mode] Freq. Counter ANT VR1
Check 1) CH-Sig:1-1 Power meter Check 0.5~1.5W
Set low power (Push [2]) Am meter 1.2A or less
PTT:ON
2) CH-Sig:2-1
PTT:ON
3) CH-Sig:3-1
PTT:ON
7. Max DEV 1) Adj item [MAX] Power meter ANT Encoder 4.2kHz ±50Hz
Adjust Adjust [∗∗∗] Dev meter SP/MIC connector knob (According to
[Wide] AG:1kHz / 150mV Oscilloscope the larger +,-)
Dev meter filter AG
LPF:15kHz AF VTVM
HPF:OFF
2) Adj item
[.M A X] [.M.A.X] [.M.A.X. .]Adjust [∗∗∗]
PTT:ON
[Narrow] 1) Adj item [MAX .] 2.1kHz
Adjust [∗∗∗] (According to
PTT:ON the larger+,-)
8. MIC [Panel Test Mode] Check 2.2~3.0kHz
Sensitivity 1) CH-Sig:1-1
Check AG:1kHz / 15mV
LPF:3kHz
PTT:ON
9. QT TCXO Adj item [X Q T] ANT Encoder
Balance Adjust [200] SP/MIC connector knob
Wide, Narrow
10.DQT TCXO Adj item [X D Q T]
Balance Adjust [150]
Wide, Narrow
11.DQT VCO 1) Adj item [VDQT] Make the
Balance Adjust [∗∗∗] demodulation
Adjust LPF:3kHz waves into
[Wide] HPF:OFF square waves.
2) Adj item
[V.D Q T] [V.D.Q.T] [V.D.Q.T. .]Adjust [∗∗∗]
PTT:ON
[Narrow] 3) Adj item [VDQT .]Adjust [∗∗∗]
PTT:ON
12.QT VCO Adj item [V Q T]
Balance Adjust [∗∗∗]
200
[VDQT] x =[VQT] 150
TK-272G
38
ADJUSTMENT
Item ConditionMeasurement Adjustment Specifications/
Test equipment Terminal Parts Method Remark
13.QT Deviation 1) Adj item [FQT] Power meter ANT Encoder Wide:0.90kHz ±40Hz
Adjust Adjust [∗∗∗] Dev meter SP/MIC connector knob Narrow:0.42kHz ±40Hz
LPF:3kHz Oscilloscope
HPF:OFF AG
[Wide] 2) Adj item AF VTVM
[.F Q T] [ .F.Q. T] [ .F.Q.T. .]Adjust [∗∗∗]
PTT:ON
[Narrow] 3) Adj item [FQT.]Adjust [∗∗∗]
PTT:ON
14.DQT 1) Adj item [FDQT] Wide:0.75kHz ±50Hz
Devition Adjust [∗∗∗] Narrow:0.35kHz
Adjust LPF:3kHz
HPF:OFF
[Wide] 2) Adj item
[F.D Q T] [F.D.Q.T] [F.D.Q.T. .]Adjust [∗∗∗]
PTT:ON
[Narrow] 3) Adj item [FDQT.]Adjust [∗∗∗]
PTT:ON
15.DTMF 1) Adj item [DTMF] Wide:2.5kHz ±0.1kHz
Deviation Adjust [∗∗∗] Narrow:1.25kHz
Adjust LPF:15kHz
[Wide] HPF:OFF
PTT:ON
[Narrow] 2) Adj item [DTMF .]Adjust [∗∗∗]
PTT:ON
16.TONE 1) Adj item [TONE] Wide:3.0kHz ±0.1kHz
Deviation Adjust [∗∗∗] Narrow:1.5kHz
Adjust LPF:15kHz
[Wide] HPF:OFF
PTT:ON
[Narrow] 2) Adj item [TONE .]Adjust [∗∗∗]
PTT:ON
17.BATT 1) Adj item [BATT] Power meter ANT Encoder After pressing the BATT terminal
Detection Adjust [∗∗∗] DVM BATT knob PTT switch, confirm voltage:5.9V
Writing PTT:ON terminal that one predeter-
mined numeric in the
range of 1 to 256
appears, then press
the [2] key. That
number will be
stored in memory.
18.BATT [Panel Test Mode] Check No blinking of LED
Detection 1) CH-Sig:1-1
Check BATT terminal voltage:6.5V
PTT:ON
2) BATT terminal voltage:5.7V Blinking of LED
PTT:ON
TK-272G
39
ADJUSTMENT
Item ConditionMeasurement Adjustment Specifications/
Test equipment Terminal Parts Method Remark
BPF-WAVE
Fig. 1 Fig. 2
fL fH fC
Fig. 2(K2) (K2)
1. Sensitivity Adj item [SENS] DVM Encoder knob fL : ([S.E N S]) : [88] (K)
[60] (K2)
Adjustment Adjust [∗∗∗] fC : (S.E.N.S) : [134] (K)
[100] (K2)
fL fc fH
[S.E N S] [S.E.N.S] [S.E.N.S. .] fH : (S.E.N.S. .) : [180] (K)
[130] (K2)
2. BPF (PANEL TEST MODE) Tracking generator ANT L305, L306, L307 Adjust wave form
CH-Sig 2-1 spectrum analyzer to figure 1.(fL)
Tra-G setting -40dBm BPF
CH-Sig 1-1 Check wave form to figure 2.(fC)
CH-Sig 3-1 Check wave form to figure 1.(fH)
Fig. 1
(K) (K)
TK-272G
40
3. Sensitivity [Panel Test Mode] SSG ANT
Check 1) CH-Sig:1-1 AF VTVM Check 12dB SINAD or
SSG OUT Oscilloscope more
Wide:-117dBm (0.3µV)
(MOD:1kHz / ±3kHz)
Narrow:-115dBm (0.4µV)
(MOD:1kHz / ±1.5kHz)
4. Squelch (open) 1) Adj item [SQL3] Encoder Adjust to the
Adjust Adjust [∗∗∗] knob squelch
[Wide] SSG OUT: squelch. threshold point
Wide:-125dBm
Narrow:-124dBm (0.14µV)
5. Squelch(Tight) 1) Adj item [SQL9] Adjust to the
Adjust Adjust [∗∗∗] squelch
[Wide] SSG OUT: threshold point
Wide:-117dBm (0.3µV)
[Narrow] 1) Adj item [SQL9.]
SSG OUT:
Narrow:-116dBm (0.35µV)
6. Squelch [Panel Test Mode] Check Squelch must
Check 1) CH-Sig:1-1 be opened.
SQ Level:[SQL5]
SSG OUT:
-118dBm (0.28µV)
2) SSG OUT:OFF Squelch must
be closed.
Item ConditionMeasurement Adjustment Specifications/
Test equipment Terminal Parts Method Remark
ADJUSTMENT
Adjustment points TX-RX unit (X57-587)Component side view Foil Side View
VR1 : Frequency adjustment TC1 : Transmit lock voltage adjustmentTC2 : Receive lock voltage adjustmentL305:L306: Band-pass filter waveform adjustmentL307:BPF : Band-pass filter test pointCV(LV) : Lock voltage adjustment terminal.
Fig. 2 Adjustment points
MIC
MIC SP
IC14
C13
BPF
CN3
ANT
VR1
IC12
LV
CV
L307
L306L305
TC1
TC2
Battery terminal
BPF
ANT
MIC SP
A B C D E F G H I J K L M N O P Q R S
1
3
4
5
6
7
8
9
10
11
12
13
14
2
41 42
TK-272G
DISPLAY UNIT (X54-3250-10) Component Side View DISPLAY UNIT (X54-3250-10) Foil Side View
C50
1
C502
C503
1
16
SBKOUT3KOUT2KOUT1KOUT0
KIN4KIN3KIN2KIN1KIN0LMPGND
CLDI
5MCE
C50
4
C505
C506
C507 C508
C509
C515
C51
6
CP501
CP502
CP503
D50
1
D502
D503
D504D
505
D50
7
IC501
1 16
48 33
17
32
64
49
L501
L502
Q501
B
C
E
Q502
R50
1
R50
2
R503
R50
4
R505R506
R507
R508
R50
9
R510
R51
2
R51
4
R517
R518
R519
R520 R52
1
R522
R523
R52
4
CN
501
C51
3
R51
1R513
R51
6
R51
5
D50
6
LCD
D508
D509
D510
LEDJ72-0663-02 d i r e c t i o n
D51
1
D512
D513
D514
D515
1 2 3 A
4 5 6 B
7 8 9 C
∗ 0 # D
D516
∗#
D50
6
LCD
D508
D509
D510
J72-0663-02LED d i r e c t i o n
D51
1
D512
D513
D514
D515
123A
456B
789C
0D
D516
C50
1
C502
C503
1
16
SBKOUT3KOUT2KOUT1KOUT0KIN4KIN3KIN2KIN1KIN0LMPGNDCLDI5MCE
C50
4
C505
C506
C507C508
C509
C515
C51
6
CP501
CP502
CP503
D50
1
D502
D503
D504
D50
5
D50
7
IC501
116
4833
17
32
64
49
L501
L502
Q501
B
C
E
Q502
R50
1
R50
2
R503
R50
4
R505 R506
R507
R508
R50
9
R510
R51
2
R51
4
R517
R518
R519
R520R52
1
R522
R523
R52
4
CN
501
C51
3
R51
1 R513
R51
6
R51
5
DISPLAY UNIT (X54-3250-10)Component Side View
.ON.feR sserddA105CI E4105Q H4205Q G4105D D4205D F5305D F5405D F5505D D4605D H4705D G4805D G8905D G9015D G01115D C4215D D8315D D9415D D01515D G7615D D7
.ON.feR sserddA105CI N4105Q K4205Q L4105D O4205D M5305D M5405D M5505D O4605D K4705D L4805D L8905D L9015D L01115D P4215D O8315D O9415D O01515D L7615D O7
DISPLAY UNIT (X54-3250-10)Foil Side View
Component Side
Foil Side
Component Side
Foil Side
2SC4617(S)
B
C
E
2SB1132(Q,R)
B CE
LC75823W
PC BOARD VIEW
A B C D E F G H I J K L M N O P Q R S
1
3
4
5
6
7
8
9
10
11
12
13
14
2
4443
TK-272G
Component side
Foil side
Pattern 1
Pattern 2Pattern 3Pattern 4
.ON.feR sserddA
1CI E8
3CI F6
5CI O4
6CI P4
01CI M4
11CI C5
21CI O5
31CI O7
41CI L4
51CI M6
61CI K7
71CI I3
81CI J6
91CI J8
31Q G6
51Q E6
62Q K8
03Q E4
13Q N8
23Q D5
33Q D5
43Q D6
53Q L3
63Q M6
51D F5
71D M7
81D B5
91D M7
22D F5
32D M3
TX-RX UNIT (X57-587X-XX)Component Side View
30622M4102GP DTA114EE
DTA144EE
DTC114EE
2SA1362(GR)
2SC4619
B
C
E
2SK1588
UPA672T
2SK1824
S
G
D
TA7368F
X9C103SI
1
4
5
8
AT29C020-90TI
AT2408SN10SI2.5
TC35453F
BU4094BCFV
NJM2904V
TA73W01FU
TC75W51FU
5
8
1
4
LC73872M
M68732H
12
34
5
S401
PT
T
LAM
P
MO
NIS402 S403
Q26
R101
MIC
1
IC6
IC18
1
7
14
8
L39
IC11
1 5
10
6 IC14
1
11
33
23
1222
4434
IC10
1 1 8
16 99 16
8
1
4
8 5
IC13
1 25
75 51
26
50
100
76
IC5
IC15
1 4
8 5C
222
C257
C208
C24
9
IC19
1 1 4
8 5
4
85
C25
4
C25
0
C258
C245
Q36
C25
2C
260
C261
C101
D22
B
BP
F
X57
-587
X-X
X(A
/ 2)
J72-
0664
-12
X57-587X-XX(B / 2)
C159C
201
CN3
AN
T
C24
4
R16
1
Q33
Q34
C20
4
C21
0
R166
C17
4
C176 C17
8
C17
7
TX
D
AFO
RXD
R131
R130C
181
C18
2
R16
2
C225
C223
C199
R15
8
C184
R208
R18
4
C22
1
C203
C58
R71
C23
8
C23
1
IC16
R70
R20
4
C23
2
R21
3R
212
R123
R18
2
C20
6
R144
C18
3
R14
3
R15
2
R15
4
R15
3
R232R231
R17
1
R168
R16
9
R17
5
R233R22
3
C253
R31
R60
C19
0C
236
R181
C212
R167
R20
6
R20
7
R14
8
R147
R19
8
R172
Q35123
654
R13
8
F1
C10
4
IC3
1
4
8
5R59
R151
R127
D GS
R133
R137
R22
4
C162
R120
R121
C180
L41
CP
10
CP2
R122
R118
L43
L40
Q15C11
1
12
R241R235
R234
R24
2
C25
9
R230
R17
9 C21
9
R173R183
R17
4
R35
R226R22
1
C247
R22
0
R219
R225
R21
5
C23
9
C235
C234 C24
0
C24
8
C25
1
CP19
C24
3R218
R24
0
R23
9
R222
R14
9
R15
6R64
R73
R68
Q13C96
R55
R49
R45
R54
R62
C95
C71
R46
R50
C242
R16
0
R14
5
Q30
R205L44C
173
R20
1R185
C21
8
R20
0
L42
R135
R139
C20
5
C19
8
R163
C19
1
R170 C216
C209
R20
2C
230
R18
6
C22
7
C226
R21
1
R21
0
C23
3
R20
9
R19
9C224
C215R159
C21
7
C207
R180
R34
R65
VR1
R15
0R
214
C185
Q31
C19
3
R146
R155
C189
C16
5
IC12
1
16
32
17
C19
2
C21
3
CP
11
CP3
CP4
CP
8
CP
9
CP5
CP
7
CP
12
CP
13
CP
14
CP
18C
P16
CP
17
CP
15R
176
R14
0
R177
R17
8
GN
D PT
T
LAM
P
MO
NI
C100
C161
D15
L11
R10
4
R20
3
R61
C13
8
C14
1
LV
C17
9
C194
C20
0
C21
1
CP
6
D18
R92
IC1
R249
R250
CN1
1 1 6
CE
5M DI
CL
GN
DLM
PK
IN0
KIN
1K
IN2
KIN
3K
IN4
KO
UT
3K
OU
T2
KO
UT
1K
OU
T0
SB
C22
9
C26
6
CP
20
R100
R126R25
6
R259
C22
0
C24
6
C255
IC17
14
85
X3
D23
C26
8
C26
9
C27
0
R260
R26
1
Q32
X2
C271
D19
R237
D17
R40
C186
C187
R25
1
R255
R16
5
C19
6
R164
R15
7
C20
2
R25
4
PC BOARD VIEW
TX RX UNIT (X57-587X-XX) Component Side View0-11:TK272G K, 0-13:TK-272G K2
A B C D E F G H I J K L M N O P Q R S
1
3
4
5
6
7
8
9
10
11
12
13
14
2
4645
Component side
Foil side
Pattern 1
Pattern 2Pattern 3Pattern 4
.ON.feR sserddA
2CI H7
4CI J4
7CI D8
8CI D5
9CI D6
103CI L8
1Q I7
2Q K7
3Q K7
4Q L7
6Q M7
7Q J6
8Q J6
9Q N6
01Q J8
11Q J6
21Q I5
41Q I5
61Q G8
71Q I5
81Q F8
91Q L5
02Q F8
12Q F8
22Q J3
32Q I3
42Q Q5
52Q R5
72Q E8
82Q E8
103Q O5
1D I7
2D J7
3D P7
4D J7
5D L6
6D J6
7D P5
8D O7
9D J7
01D L6
11D I8
21D J6
31D I4
41D I4
12D D7
103D P6
203D N5
303D O4
503D M5
TX-RX UNIT (X57-587X-XX)Foil Side View
DTA114EE
DTA114YE
DTA144EE
DTC114EE
DTC144EE
2SC4226(R24)
2SC4617(S)
2SC5108(Y)
2SC4649(N,P)
B
C
E
UMC4
2SC4988
2SK508NV(K52)
3SK228
UPA572T
2SJ243
S
G
D
S-81350HG-KD PST9140NR
RN5VL45C
MB15A02 TA31136FN
UMG3N
1
3
4
5
FP210
B1
B2
C1
C2EC
R85
Q812
543
R17
IC2
1 10
20 11
CF2
D14
R81
RAO
RAI
IO
SQ
MIC
MIC
SM
TONE
SP
GND
D13
R80
CF1
R78
R79
C12
8
C14
8
R96
C137C135 DS
G2G1
C136
L35
BPF
Q22
C54
C53
C68D8
R26
C55
C35
C57
Q9
C94
Q3
C76
D11
TC
2
C88
C89
Q10
C82
R52
R47
C51CV
Q17
Q23
12
53 4
C139
C130
R82
C13
2
C15
1
R11
4
Q27
C140
C11
8
IC7
I
G
O
C157
C15
0
C152
R115
C81
Q12
C60
C87
C86
C99
X1
VC GND
5C XOUT
1 2
4 3
C31
C9
Q1
R20
C74
C73
R19
D7
C52
C75
C11
0
C109
C23
C24
C25
R75 R74
C121
Q11
D12
C84
R53
Q18
1
2
34
5
Q21
1
2
5
34
12
5
34
1
2
5
34
R1
UL
L2
R4
R41
Q16
R
C
T
SB
A1
5C
C113
Q28 R
109
R10
7
R10
6
R69
R98
R108CD1
R43
R77
C120
A3
SB
A2
A4
R58
R56
R57
R91
R90
R89
R88
D21
L302
Q19
C11
2
C28
C8 R301
Q14
C108
R44
R11
6
L38
C15
3
C126C12
5
R87
L37 L36
R95
R39
R29L19R28
Q20
L15
R18
R33
L20
R94
R99
C131
R30
6
B
C31
2
R76
D10
L21
C30
D5
Q4
R37
L18
R23
C11
R5
Q6
E
C
B
R6C12
L27
L10
D3
C13
R10 L9
C40
R27
C41
C85
L23
L12
C10
D2
D4
R13
TC1
R16
C45
C33
D6
C22
C17
L3
L25
Q7
R42
R38
Q2R3
R2
C14
C16
L4
C18
R36
C27
C64L3
1
D9
C62 L26C72
L22
C63
L30R30
R22
R10
5
C13
3
R93
R97
C124
R86
C11
4
C12
3
R84
R10
3R
102
R11
7
C70
R48
L24
C78
R51
C44C43
C42
CP1
D1
R8
R7
C1
R257
L14
R14C36
R21
C37
C4
C5
C48
C49C
32
C142
C11
9
C122
C14
3
C14
4
C163
C164
C166
C167
C17
0
C17
1
PT
T
IC4
1
8
16
9IC
8
13
54IC
91 3
5 4
J1
Q24
Q25
R11
0
R11
1
R11
2
R11
3E
N1
R11
9
R124
R12
8
R12
9
R13
2
TAO
M M
UT
E
S M
UT
EA5
TAI
A6
R14
2
R24
4
C107
C115
C146
C14
7
C15
5
C156
XF1
C26
2
C26
3
R72
C241
MIC1
C90
C15
8
C32
6 L17L308
L6
VR
2
C6
R25
3
R25
2
C26
5
R258
C30
7
L32
L7
L5
C3
R30
8
R305C31
1
C324D30
3 R31
3
L307
R31
1
C31
7
C31
8R
316
Q30
1
R302
R304
C31
6
C32
3D30
2
R31
2
C30
5
C30
3
IC3011
4
8
5
R318
R319
C301
L305L306
R303 C30
8
L304
C319
C320
D30
5
R314R83
C12
9
C26
C20
C21
D301
R307
R30
9
C310C315
C309
C31
4
R247
R248
R320
C98
X57
-587
X-X
X(A
/ 2)
J72-
0664
-12
X57-587X-XX(B / 2)
TK-272GPC BOARD VIEW
TX RX UNIT (X57-587X-XX) Foil Side View0-11:TK272G K, 0-13:TK-272G K2
A B C D E F G H I J K L M N O P Q R S
1
3
4
5
6
7
8
9
10
11
12
13
14
2
4847
TK-272G
Component side
Foil side
Pattern 1
Pattern 2Pattern 3Pattern 4
TX-RX UNIT (X57-587X-XX)Component Side + Foil Side View
DTA114EE
DTA114YE
DTA144EE
DTC114EE
DTC144EE
2SA1362(GR)
2SC4226(R24)
2SC4617(S)
2SC4619
2SC5108(Y)
2SC4649(N,P)
B
C
E
30622M4102GP UMC4
2SC4988
2SK508NV(K52)
3SK228
2SK1588
UPA572T
UPA672T
2SJ243
2SK1824
S
G
D
TA7368F
S-81350HG-KD
X9C103SI
1
4
5
8
AT29C020-90TI
AT2408SN10SI2.5
TC35453F
PST9140NR
RN5VL45C
MB15A02
BU4094BCFV
NJM2904V
TA73W01FU
TC75W51FU5
8
1
4
.ON.feR sserddA
1CI E8
2CI L7
3CI F6
4CI J4
5CI O4
6CI P4
7CI P8
8CI P5
9CI P6
01CI M4
11CI C5
21CI O5
31CI O7
41CI L4
51CI M6
61CI K7
71CI I3
81CI J6
91CI J8
103CI H8
1Q K7
2Q I7
3Q I7
4Q H7
6Q G7
7Q I6
8Q J6
9Q F6
01Q J8
11Q J6
21Q K5
31Q G6
41Q K5
51Q E6
61Q K8
71Q K5
81Q N8
91Q H5
02Q N8
.ON.feR sserddA
12Q N8
22Q J3
32Q K3
42Q C5
52Q B5
62Q K8
72Q O8
82Q O8
03Q E4
13Q N8
23Q D5
33Q D5
43Q D6
53Q L3
63Q M6
103Q E5
1D K7
2D J7
3D D7
4D J7
5D H6
6D J6
7D D5
8D E7
9D J7
01D H6
11D K8
21D J6
31D K4
41D K4
51D F5
71D M7
81D B5
91D M7
12D P7
22D F5
32D M3
103D D6
203D F5
303D E4
503D G5
FP210
B1
B2
C1
C2EC
TA31136FN
LC73872M
M68732H
12
34
5
UMG3N
1
3
4
5
R85
Q812
543
R17
IC2
110
2011
CF2
D14
R81
RAO
RAI
IO
SQ
MIC
MIC
SM
TONE
SP
GND
D13
R80
CF1
R78
R79
C12
8
C14
8
R96
C137C135D S
G2 G1
C136
L35
BPF
Q22
C54
C53
C68D8
R26
C55
C35
C57
Q9
C94
Q3
C76
D11
TC
2
C88
C89
Q10
C82
R52
R47
C51CV
Q17
Q23
1 2
5 34
C139
C130
R82
C13
2
C15
1
R11
4
Q27
C140
C11
8
IC7
I
G
O
C157
C15
0
C152
R115
C81
Q12
C60
C87
C86
C99
X1
VCGND
5CXOUT
12
43
C31
C9
Q1
R20
C74
C73
R19
D7
C52
C75
C11
0
C109
C23
C24
C25
R75R74
C121
Q11
D12
C84
R53
Q18
1
2
34
5
Q21
1
2
5
34
12
5
34
1
2
5
34
R1
UL
L2
R4
R41
Q16
R
C
T
SB
A1
5C
C113
Q28R
109
R10
7
R10
6
R69
R98
R108CD1
R43
R77
C120
A3
SB
A2
A4
R58
R56
R57
R91
R90
R89
R88
D21
L302
Q19
C11
2
C28
C8R301
Q14
C108
R44
R11
6
L38
C15
3
C126 C12
5
R87
L37L36
R95
R39
R29 L19R28
Q20
L15
R18
R33
L20
R94
R99
C131
R30
6
B
C31
2
R76
D10
L21
C30
D5
Q4
R37
L18
R23
C11
R5
Q6
E
C
B
R6 C12
L27
L10
D3
C13
R10L9
C40
R27
C41
C85
L23
L12
C10
D2
D4
R13
TC1
R16
C45
C33
D6
C22
C17
L3
L25
Q7
R42
R38
Q2R3
R2
C14
C16
L4
C18
R36
C27
C64 L3
1
D9
C62L26C72
L22
C63
L30 R30
R22
R10
5
C13
3
R93
R97
C124
R86
C11
4
C12
3
R84
R10
3R
102
R11
7
C70
R48
L24
C78
R51
C44C43
C42
CP1
D1
R8
R7
C1
R257
L14
R14C36
R21
C37
C4
C5
C48
C49 C
32
C142
C11
9
C122
C14
3
C14
4
C163
C164
C166
C167
C17
0
C17
1
PT
T
IC4
1
8
16
9
IC8
1 3
5 4IC
913
54
J1
Q24
Q25
R11
0
R11
1
R11
2
R11
3E
N1
R11
9
R124
R12
8
R12
9
R13
2
TAO
M M
UT
E
S M
UT
E A5
TAI
A6
R14
2
R24
4
C107
C115
C146
C14
7
C15
5
C156
XF1
C26
2
C26
3
R72
C241
MIC1
C90
C15
8
C32
6L17 L308
L6
VR
2
C6
R25
3
R25
2
C26
5
R258
C30
7
L32
L7
L5
C3
R30
8
R305 C31
1C324 D
303R31
3
L307R
311
C31
7
C31
8R
316
Q30
1
R302
R304
C31
6
C32
3 D30
2
R31
2
C30
5
C30
3
IC3011
4
8
5
R318
R319
C301
L305L306
R303C30
8
L304
C319
C320
D30
5
R314R83
C12
9
C26
C20
C21
D301
R307
R30
9
C310C315
C309
C31
4
R247
R248
R320
C98
S401
PT
T
LAM
P
MO
NIS402 S403
Q26
R101
MIC
1
IC6
IC18
1
7
14
8
L39
IC11
1 5
10
6 IC14
1
11
33
23
1222
4434
IC10
1 1 8
16 99 16
8
1
4
8 5
IC13
1 25
75 51
26
50
100
76
IC5
IC15
1 4
8 5C
222
C257
C208
C24
9
IC19
1 1 4
8 5
4
85
C25
4
C25
0
C258
C245
Q36
C25
2C
260
C261
C101
D22
B
BP
F
X57
-587
X-X
X(A
/ 2)
J72-
0664
-12
X57-587X-XX(B / 2)
C159C
201
CN3
AN
T
C24
4
R16
1
Q33
Q34
C20
4
C21
0
R166
C17
4
C176 C17
8
C17
7
TX
D
AFO
RXD
R131
R130C
181
C18
2
R16
2
C225
C223
C199
R15
8
C184
R208
R18
4
C22
1
C203
C58
R71
C23
8
C23
1
IC16
R70
R20
4
C23
2
R21
3R
212
R123
R18
2
C20
6
R144
C18
3
R14
3
R15
2
R15
4
R15
3
R232R231
R17
1
R168
R16
9
R17
5
R233R22
3
C253
R31
R60
C19
0C
236
R181
C212
R167
R20
6
R20
7
R14
8
R147
R19
8
R172
Q35123
654
R13
8
F1
C10
4
IC3
1
4
8
5R59
R151
R127
D GS
R133
R137
R22
4
C162
R120
R121
C180
L41
CP
10
CP2
R122
R118
L43
L40
Q15C11
1
12
R241R235
R234
R24
2
C25
9
R230
R17
9 C21
9
R173R183
R17
4
R35
R226R22
1
C247
R22
0
R219
R225
R21
5
C23
9
C235
C234 C24
0
C24
8
C25
1
CP19
C24
3R218
R24
0
R23
9
R222
R14
9
R15
6R64
R73
R68
Q13C96
R55
R49
R45
R54R
62
C95
C71
R46
R50
C242
R16
0
R14
5
Q30
R205L44C
173
R20
1R185
C21
8
R20
0
L42
R135
R139
C20
5
C19
8
R163
C19
1
R170 C216
C209
R20
2C
230
R18
6
C22
7
C226
R21
1
R21
0
C23
3
R20
9
R19
9C224
C215R159
C21
7
C207
R180
R34
R65
VR1
R15
0R
214
C185
Q31
C19
3
R146
R155
C189
C16
5
IC12
1
16
32
17
C19
2
C21
3
CP
11
CP3
CP4
CP
8
CP
9
CP5
CP
7
CP
12
CP
13
CP
14
CP
18C
P16
CP
17
CP
15R
176
R14
0
R177
R17
8
GN
D PT
T
LAM
P
MO
NI
C100
C161
D15
L11
R10
4
R20
3
R61
C13
8
C14
1
LV
C17
9
C194
C20
0
C21
1
CP
6
D18
R92
IC1
R249
R250
CN1
1 1 6
CE
5M DI
CL
GN
DLM
PK
IN0
KIN
1K
IN2
KIN
3K
IN4
KO
UT
3K
OU
T2
KO
UT
1K
OU
T0
SB
C22
9
C26
6
CP
20
R100
R126R25
6
R259
C22
0
C24
6
C255
IC17
14
85
X3
D23
C26
8
C26
9
C27
0
R260
R26
1
Q32
X2
C271
D19
R237
D17
R40
C186
C187
R25
1
R255
R16
5
C19
6
R164
R15
7
C20
2
R25
4
PC BOARD VIEW
Connect 1 and 4.
TX RX UNIT (X57-587X-XX) Component Side + Foil Side View0-11:TK272G K, 0-13:TK-272G K2
A B C D E F G IH J K L M ON P Q SR
1
2
3
4
5
6
7
TK-272GSCHEMATIC DIAGRAM
Note) Component marked with a dot (•) are Parts of pattern 1.
56
KNB-14/KNB-15A (Ni-Cd BATTERY)LEVEL DIAGRAM
To m
ake
mea
sure
men
ts in
the
AF
sec
tion,
con
-
nect
the
AC
leve
l met
er. (
AN
T in
put
: -53
dBm
,
1kH
z F
M, 3
kHz
DE
V(W
IDE
).)
In th
e R
F s
ectio
n, u
se a
100
0pF
cou
plin
g ca
paci
-
tor.
(The
dis
play
sho
ws
the
SS
G in
put v
alue
re-
quire
d to
obt
ain
12dB
SIN
AD
With
out L
ocal
Lev
el.)
AG
is s
et to
the
MIC
inpu
t bec
omes
3kH
z D
EV.
at 1
kHz
MO
D. (
WID
E)
To m
ake
mea
sure
men
ts in
the
AF
sec
tion,
con
-
nect
the
AC
leve
l met
er.
In t
he R
F s
ectio
n, u
se a
100
0pF
cou
plin
g ca
-
paci
tor.
TK-272G TK-272G
FM IF
SY
ST
EM
C31
0
Q30
1
Q19
XF1
–123
dB
m–1
22d
Bm
–104
dB
m–1
06d
Bm
–104
dB
m–1
04d
Bm
–98d
Bm
180m
Vrm
s46
0mV
rms
Q22
C13
1C
242
IC16
54
341
IC14
IC11
SP
360m
Vrm
s19
0mV
rms
420m
Vrm
s20
mV
rms
0.63
mV
rms
–7.9
dB
m
IC17
DA
C12
13
ALC
CO
MP
SW
IDC
6
98
1918
1516
C24
3
10.5
mV
rms
9mV
rms
33m
Vrm
s285m
Vrm
s27
5mV
rms
265m
Vrm
s32
0mV
rms
120m
Vrm
s
MIC
IC14
Q6
+17.
0dB
m
–5.1
dB
m
RF
(162
.05M
Hz)
(K
)R
F (1
43.0
5MH
z) (
K2)
IF1
(49.
95M
Hz)
IF2
(450
kHz)
AF
(1kH
z)
IC15
AF
VR
C20
6C
239
Q2
Q3
C24
6C
27C
28
C14
AF
(1kH
z)
VC
O
RX
LOD10D
5
+5.6
dB
m
C12
Po
wer
Mo
du
le
5.0W
RF
(162
.05M
Hz)
AF
(1kH
z)
RX TX
+
C17
3
Q30
+
IC4
Loca
lLe
vel 4
10
67
35
IC30
1
27
D6
–3.2
dB
m
Q4
C30
C30
3
67
RF
(162
.05M
Hz)
(K
)R
F (1
43.0
5MH
z) (
K2)
KNB-15A CIRCUIT DIAGRAM SPECIFICATIONSVoltage : 7.2V (1.2V x 6)Charging current : 1100mAhDimensions : 60.8W x 110.8H x 20.3D (mm)
(projections included)Charger and charging time: KSC-15 (normal charger), approximately 8 hours KSC-16 (rapid charger), approximately 2 hoursWeight : 210g
Discharge pin side
Breaker(80±5°C)
Charge pin side
ThermistorDiode
Breaker(70±5°C)
KNB-14 CIRCUIT DIAGRAM SPECIFICATIONSVoltage : 7.2V (1.2V x 6)Charging current : 600mAhDimensions : 60.8W x 110.8H x 17.3D (mm)
(projections included)Charger and charging time: KSC-15 (normal charger), approximately 8 hours KSC-16 (rapid charger), approximately 1 hourWeight : 165g
Discharge pin side
Breaker(80±5°C)
Charge pin side
ThermistorDiode
Breaker(70±5°C)
5553 54
TK-272G TK-272GBLOCK DIAGRAM
TK-272G
57
OPTIONS
Parts No. DescriptionNewpartsRef. No.
A02-0907-08 Case (Front)A02-0908-08 Case (Rear)
B09-0316-08 Cap
D10-0606-08 Lever (PTT)
E11-0421-05 Phone jackE30-3138-08 Curl cord
F07-0889-08 Silicon rubber (PTT)
G53-0569-08 Packing (MIC case)
J29-0440-08 Clip assyJ39-0601-08 Packing (MIC)
N46-2605-60 Screw (Clip assy)N46-3016-60 Screw (Case)N80-2005-41 Screw (MIC unit)
S50-1415-05 Tact switch (PTT)
T07-0290-05 Loudspeaker (1W, 8Ω)T91-0534-08 Condenser MIC
Re-marks
KMC-17 (Speaker microphone)
Parts No. DescriptionNewpartsRef. No.
A02-1979-08 Case (Front)A02-0980-08 Case (Rear)
E11-0453-08 Phone jackE30-3239-08 Curl cord
F07-1414-08 Cover
K29-5077-08 Lever (PTT)
S70-0444-08 Tact switch (PTT)
T07-0335-05 LoudspeakerT91-0564-08 Condenser MIC
Re-marks
KMC-21 (Speaker microphone)
KMC-17 Parts List
KMC-21 Parts List
TK-272G
58
GeneralFrequency Range............................................................. 150~174MHz (K) 136~150MHz (K2)Number of channels ......................................................... Max. 32Channel Spacing .............................................................. 25kHz, 30kHz (Wide) 12.5kHz, 15kHz (Narrow)PLL channel stepping ...................................................... 2.5kHz, 5kHz, 6.25kHz, 7.5kHzOperating Voltage ............................................................ 7.5 VDC±20%Battery Life ....................................................................... More than 4 hours at 5 watts (5-5-90 duty cycle with KNB-14 battery)
More than 8 hours at 5 watts (5-5-90 duty cycle with KNB-15A battery)Operating Temperature range.......................................... -30˚C to +60˚C (-22 ˚F to +140 ˚F)Dimensions and Weight With KNB-14 (7.2V 600mAh battery) ............................. 58 (2-5/16) W x 135 (5-5/16) H x 32 (1-1/4) D mm (in)
400g (0.88lbs) With KNB-15A (7.2V 1100mAh battery) ......................... 58 (2-5/16) W x 135 (5-5/16) H x 35 (1-3/8) D mm (in)
440g (0.97lbs)
Receiver (Measurements made per EIA standard EIA-RS316B)
SensitivityEIA 12dB SINAD ........................................................... 0.25µV (Wide)/0.28µV (Narrow)
Selectivity ......................................................................... 70dB (Wide)/65dB (Narrow)Inter modulation ............................................................... 65dB (Wide)/60dB (Narrow)Spurious response ........................................................... 65dBAudio Power Output ......................................................... 500mWFrequency Stability ........................................................... ±3.0ppmChannel Frequency Spread ............................................. 24MHz (K), 14MHz (K2)
Transmitter (Measurements made per EIA standard EIA-RS 316B)
RF Power Output ............................................................. 5W/1WSpurious and Harmonics .................................................. 70dBModulation ....................................................................... 16KφF3E (Wide)/11KφF3E (Narrow)FM Noise .......................................................................... 45dB (Wide)/43dB (Narrow)Audio Distortion ................................................................ Less than 5%Frequency Stability ........................................................... ±3.0ppmChannel Frequency Spread ............................................. 24MHz (K), 14MHz (K2)
KENWOOD CORPORATION14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-8501, Japan
KENWOOD SERVICE CORPORATIONP.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745,U.S.A.
KENWOOD ELECTRONICS CANADA INC.6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
KENWOOD ELECTRONICS DEUTSCHLAND GMBHRembrücker Str. 15, 63150 Heusenstamm, Germany
KENWOOD ELECTRONICS BELGIUM N.V.Mechelsesteenweg 418 B-1930 Zaventem, Belgium
KENWOOD ELECTRONICS FRANCE S.A.13, Boulevard Ney, 75018 Paris, France
KENWOOD ELECTRONICS U.K. LIMITEDKENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom
KENWOOD ELECTRONICS EUROPE B.V.Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
KENWOOD ELECTRONICS ITALIA S.p.A.Via G. Sirtori, 7/9 20129 Milano, Italy
KENWOOD IBERICA S.A.Bolivia, 239-08020 Barcelona, Spain
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.(A.C.N. 001 499 074)16 Giffnock Avenue, North Ryde, N.S.W. 2113, Australia
KENWOOD ELECTRONICS (HONG KONG) LTD.Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T.,Hong Kong
KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.Sales Marketing Division1 Ang Mo Kio Street 63, Singapore 569110
SPECIFICATIONS
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